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Mesozoic Valley Panorama

The Mesozoic Valley is the third of the main simulations, featuring the evolutionary history of prehistoric creatures throughout the Mesozoic Era. It primarily includes various species of dinosaur, but also some non-dinosaur prehistoric creatures. It explores the evolution of dinosaurs from archosaurs, through their extinction in the Cretaceous-Paleogene Extinction Event, and into their eventual evolution into modern birds. The games main mascot, Archie the Archosaur, originated in this simulation.


Great Fossil Portal[]

Mesozoic valley

The Great Fossil Portal is the entrance to the Mesozoic Valley from the Primary Simulation. The Story of the Mesozoic Valley begins there.

An explanation on how to unlock it can be found here.

Field Notes[]

The Mesozoic Valley has Field Notes that records all major milestones. The field notes can be found in the fourth tab of the menu and then selecting the book-subtab.


"Hello... again. I am Semblance, the artificial intelligence running this simulation. You've discovered a strange fossil. Now I need you to simulate a live specimen for study. These creatures were once the dominant form of life on Earth. Perhaps learning about how they met their demise will teach us how humans may meet their end. Are you prepared? - (Yes) - Excellent!"

"You've discovered the Mesozoic Valley."

"You can return to the main tree at any time."

Mutagen collected

"Use MutagenMutagen Mutagen to upgrade evolutionary traits."

First Asteroid called

"Are you ready to trigger the extinction event? The dinosaur evolution tree will be reset, but you will keep all your evolutionary traits and mutagen. - (Yes)"

"A meteorite struck the earth and caused an extinction event. Those <current number of dinosaurs> are no more."

"Their loss is unfortunate, but their sacrifice is necessary for our research. Get back to work on a new simulation - we must successfully generate all the possible dinosaurs in this reality."

Reaching Rank 3

"It's astonishing to see how similar these creatures are to modern reptiles."

"Turtles added to main simulation."

Reaching Rank 5

"You've uncovered an impressive level of diversity amongst these creatures, but none of them matches the fossil we found yet."

Reaching Rank 6

"Crocodiles added to main simulation."

Reaching Rank 10

"Lizards added to main simulation."

Game Mechanics[]

The Mesozoic Valley begins with a single dinosaur node, with more species unlocking as you advance in Extinctions. Clicking the screen will generate Fossil Points at the rate of one per click, but they can be gained at a faster rate by clicking the arrow button on top of each dinosaur node in the tree to 'charge' the node. Tapping the dinosaur itself allows you to purchase more copies of the dinosaur, which increases the payout from each charge.

Dinosaurs will not automatically generate fossils without tapping until you unlock the corresponding Trait Cards. These traits automate production of Fossils for each dinosaur, removing the need to tap on the arrow button and increasing the productivity of each dinosaur. Trait Cards are improved and upgraded using Mutagen, a currency gained by purchasing a certain number of dinosaurs, but must first be unlocked by collecting the cards from Geodes.

At the top of the screen are quests, which give the player goals like «Collect 25 Stegosaurus», «Upgrade 3 Traits», and «Photograph Archosaur». Three quests are displayed at a time, and with each rank more quests are required to be completed to advance to the next level. Once a quest is completed, the player will receive a Stone Geode containing Mutagen and Trait Cards.


After completing enough quests for each rank of the Mesozoic Valley, you have the option to trigger an Extinction Event (although there will typically be additional quests remaining, which you can optionally complete for extra rewards). When this happens, an asteroid falls from the sky, wiping out your dinosaurs and restarting the valley in a fashion similar to the reboot triggered by the first Singularity. This allows the player to unlock new dinosaurs. It will also give you a Silver Geode, and increase the valley's Simulation Level by 1. Each additional rank of the Mesozoic Valley will increase the speed of the main simulation with diminishing returns; the speed multiplier is 1 + (rank / 10), so rank 1 gives a 1.1x multiplier, rank 2 gives 1.2x, up to rank 50 giving 6x. Reaching certain ranks will also unlock additional bonus generators for the main sim.


At rank 50, the «Asteroid» button changes to a «Prestige» button, allowing you to reboot the Mesozoic Valley in exchange for one Warm Climate Trait card at level one, which provides a 50% bonus to payout from all dinosaurs. Epic and rare traits are saved, and so is Mutagen, but common Trait cards are set to zero. Rank is incremented to prestige rank 1, which retains the multiplier for the main simulation (so the multiplier is now x6.1), and the reptile generators remain unlocked.

The maximum number of prestiges is 10. It is generally advisable to stockpile as much Mutagen as possible along the way, so that you can advance your dinosaurs as far as possible.

You can view the full dinosaur simulation map in this section.

Types of Dinosaurs[]

The following table shows some info about the Dinosaurs. «Cost» indicates the amount of Fossils needed to buy the first copy of each dinosaur. The cost increases by 15% (compounding) each time a new copy is bought. The cost can be decreased by obtaining rare or epic Traits.

«Gain» is the cost of Fossils per dinosaur that are obtained each time the dinosaur cycle finishes. This amount increases when the corresponding payout Traits are activated.

«Duration» is the initial time for one cycle to be completed. It can be decreased by activating Traits. By activating the first duration decreasing Trait, the dinosaur cycle is automated. Once the cycle becomes extremely short, it is replaced with a simple fossil rate per second. Each asteroid/reset, the cycle time will double.

«Unlock» is the rank needed to be able to buy the first copy of the dinosaur.

«Trait» is the ranks that are needed to unlock the single dinosaur Traits; automation/speed followed by payout.

Dinosaur Base Cost Base Gain Base Duration Unlock Trait
Archosaur 3.74 1 0.6s Lvl 1 2, 4
Ornithischia 60 60 3s 2, 6
Stegosaurus 720 720 6s 3, 6
Ankylosaurus 8,640 4,320 12s Lvl 2 3, 5
Triceratops 103,680 51,840 24s Lvl 3 4, 8
Pterosaur 1.24e6 207,360 18s Lvl 4 5, 10
Plesiosaur 1.49e7 2.20e6 36s Lvl 6 7, 12
Saurischia 1.79e8 5.16e6 14s Lvl 8 9, 12
Sauropoda 2.15e9 2.36e8 120s Lvl 10 11, 14
Theropoda 2.58e10 1.68e8 16s Lvl 12 13, 16
Compsognathus 3.10e11 2.24e8 4s Lvl 14 15, 18
Velociraptor 3.72e12 6.71e9 20s Lvl 16 17, 19
Pachycephalosaurus 4.46e13 7.16e10 40s Lvl 18 19, 22
Gallimimus 5.35e14 7.64e10 8s Lvl 20 21, 24
Archaeopteryx 6.42e15 1.53e12 30s Lvl 22 23, 26
Brachiosaurus 7.70e16 6.11e13 200s Lvl 24 25, 28
Tyrannosaurus Rex 9.24e17 1.63e14 100s Lvl 26 27, 28
Spinosaurus 1.1e19 7.82e14 90s Lvl 28 29, 30
Iguanodon 1.33e20 2.23e15 48s Lvl 30 31, 32
Ichthyosaur 1.60e21 7.41e15 30s Lvl 33 34, 35
Cynodont 1.92e22 2.64e16 20s Lvl 36 37, 38
Eoraptor 2.30e23 2.81e17 40s Lvl 39 40, 41
Mosasaurus 2.76e24 9.00e18 240s Lvl 42 43, 44
Argentinosaurus 3.3e25 6.4e19 320s Lvl 45 46, 47
Giganotosaurus 3.97e26 5.33e20 500s Lvl 48 49, 50

Traits (incomplete)[]

Traits are cards that can upgrade dinosaurs at the cost of Mutagen. When you open Geodes, you can gain a mix of Mutagen, Darwinium, and Traits. You can also watch «Mystery Trait» ads to gain cards for a single random trait.

Common traits affect a single dinosaur. Rare traits affect a whole category of dinosaurs, such as «all carnivores» or «all bipeds». Epic traits affect every dinosaur.

Trait Paths[]

For each Trait, as you level it up using more cards, it will follow one of a few different paths:

Speed Path[]

  • The first upgrade automates a dinosaur so it will produce fossils without tapping.
  • Further upgrades double production speed.

Payout Path[]

Doubles payout each upgrade.

Cost Path[]

Reduces the purchase price of each dinosaur. Only comes from Rare and Epic traits.

Fossil Tap Path[]

The Rare «Ammonoidea» trait is a special case, increasing the payout from tapping the screen.


Trait upgrades also have an associated cost, as follows:

Upgrade No. Copies Required Cost & Rate Increase Rate Increase for Epic Cards
1 1 10 Mutagen (x 2) x 1.5
2 2 50 Mutagen (x 4) x 2
3 5 100 Mutagen (x 8) x 2.5
4 10 200 Mutagen (x 16) x 3
5 20 300 Mutagen (x 32) x 3.5
6 50 400 Mutagen (x 64) x 4
7 100 1,000 Mutagen (x 128) x 4.5
8 200 2,000 Mutagen (x 256) x 5
9 400 4,000 Mutagen (x 512) x 5.5
10 800 8,000 Mutagen (x 1024) x 6
11 1,000 20,000 Mutagen (x 2048) x 6.5
12 2,000 40,000 Mutagen (x 4096) x 7
13 5,000 80,000 Mutagen (x 8192) x 7.5
14 5,000 125,000 Mutagen (x 16384) x 8
15 5,000 250,000 Mutagen (x32768) x 9
16 and more 5,000 500,000 Mutagen (x2 by level) +0.5 by level

The current (11/2020) maximum level for a card upgrade is 20.

Trait Cards[]

Common traits[]

Dinosaur Speed Path Payout Path
Archosaurs Opisthopubic Pelvis Propubic Pelvis
Ornithischia Predentary Bone Duckbills
Stegosaurus Armor Flat Teeth
Ankylosaurus Tail Club Ossification
Triceratops Nose Brow Horns Frill
Pterosaurs Wings Extended Finger
Plesiosaurs Aquatic Diapsid Flippers
Saurischia Mobile Neck Upright Posture
Sauropoda Rapid Tooth Replacement Gastroliths
Theropoda Grasping Hands Sharp Teeth
Compsognathus Small Bodies Sharp Eyesight
Velociraptor Sickle Shaped Claw Pack Hunting
Pachycephalosaurus Hard Head Olfactory Lobes
Gallimimus Nest Building Three-toed Feet
Archaeopteryx Bird Brain Flight Feathers
Brachiosaurus Long Tails Pencil-like Teeth
Tyrannosaurus Rex Alpha Predator Brawny Neck
Spinosaurus Spines Semi-Aquatic
Iguanodon Thumb Spikes Changing Posture
Ichthyosaur Live Birth (Viviparous) Large Eyes
Cynodont Burrowing Whiskers
Eoraptor Heterodont Dentition (Omnivore) True Fossil
Mosasaurus Double-Hinged Jaw Scales
Argentinosaurus Accelerated Growth Giant Vertebrae
Giganotosaurus Giganotothermy Jaw Articulation

Rare traits[]

— Bipedal — Rare — Speed path for dinosaurs with the Bipedal trait.

— Quadrupedal — Rare — Speed path for dinosaurs with the Quadrupedal trait.

— Ammonoidea — Rare — Increases clicking payout.

— Herbivore — Rare — Payout path for dinosaurs with the Herbivore trait.

— Carnivore — Rare — Payout path for dinosaurs with the Carnivore trait.

— Parallel Evolution — Rare — Speed path for dinosaurs with the Parallel Evolution trait.

— Aquatic — Rare — Speed path for dinosaurs with the Aquatic trait.

— Triassic Age — Rare — Discounts price for dinosaurs with the Triassic Age trait.

— Jurassic Age — Rare — Discounts price for dinosaurs with the Jurassic Age trait.

— Cretaceous Age — Rare — Discounts price for dinosaurs with the Cretaceous Age trait.

Epic traits[]

— Herd Behavior — Epic — Payout path for all dinosaurs (at a slower rate than common payout paths)

— Hollow Bones — Epic — Speed path for all dinosaurs (at a slower rate than common payout paths)

— Feathers — Epic — Discounts price for all dinosaurs

— Warm Climate — Epic — Increase dinosaur payout x1.5


Mutagen is earned by reaching production targets for each species of dinosaur, and unlocking Geodes.

Geode payouts are randomized, but increase with your simulation rank. Production rewards are fixed in value, but paid separately for each species, so unlocking more species gives you access to more rewards.

Dinosaur count Reward
10 2 MutagenMutagen
25 4 MutagenMutagen
50 6 MutagenMutagen
100 10 MutagenMutagen
150 20 MutagenMutagen
250 40 MutagenMutagen
500 60 MutagenMutagen
600 80 MutagenMutagen
800 100 MutagenMutagen
1,000 150 MutagenMutagen
2,000 250 MutagenMutagen

Unlocking in primary simulation[]

Reaching certain ranks will unlock the following generators for the primary simulation as part of the Rise of Reptiles branch:



Trait Effects[]

Common Rare Epic
Speed multiplier = 2rank - 1 Rank 1-8: multiplier = 1 + 0.25 * rank
Rank 9-14: multiplier = 1.5 + 0.25 * rank
Rank 15-20: multiplier = 2 + 0.25 * rank
multiplier = 1 + 0.5 * rank
Income multiplier = 2rank Rank 1-8: multiplier = 1 + 0.25 * rank
Rank 9-14: multiplier = 1.5 + 0.25 * rank
Rank 15-20: multiplier = 2 + 0.25 * rank
multiplier = 1 + 0.5 * rank
Discount - multiplier = 1 + 0.15 * rank multiplier = 1 + 0.25 * rank
Tap - Rank 1-5: multiplier = 1 + 0.4 * rank
Rank 6-20: multiplier = 4 + (rank - 6)2/2 + 0.5 * (rank - 6)

Rank Details[]

Rank Unlocks Geode Rewards Tasks Required Tasks

I Dinosaurs:


- 3/3 Collect 15 Archosaur
Collect 25 Ornithischia
Collect 35.000 FossilFossil
II Dinosaur:


The Shop

Stone Geode:
  • MutagenMutagen 20-25
  • Cards 1
6/6 Collect 36 Archosaur
Collect 41 Ornithischia
Upgrade 1 Trait
Collect 32 Stegosaurus
Collect 15 Ankylosaurus
Collect 1.5e6 FossilFossil
III Dinosaur:


Gold Geode

Stone Geode:
  • MutagenMutagen 21-26
  • Cards 2

Gold Geode:

  • MutagenMutagen 84-104
  • Cards 6
7/7 Collect 50 MutagenMutagen
Collect 55 Archosaur
Collect 55 Ornithischia
Collect 8 Triceratops
Collect 25 Stegosaurus
Collect 30 Ankylosaurus
Collect 1e7 FossilFossil
IV Dinosaur:


Diamond Geode

Stone Geode:
  • MutagenMutagen 23-28
  • Cards 3

Gold Geode:

  • MutagenMutagen 92-112
  • Cards 9

Diamond Geode:

  • MutagenMutagen 1380-1680
  • Cards 105
8/8 Collect 2 Traits
Collect 65 Archosaur
Collect 71 Ornithischia
Collect 100 MutagenMutagen
Collect 8 Pterosaur
Collect 26 Triceratops
Collect 46 Ankylosaurus
Collect 1e8 FossilFossil
V Dinosaur:


Stone Geode:
  • MutagenMutagen 27-32
  • Cards 5
  • 3% rare

Gold Geode:

  • MutagenMutagen 108-128
  • Cards 15
  • 3 rare

Diamond Geode:

  • MutagenMutagen 1620-1920
  • Cards 175
  • 20 rare
9/11 Upgrade 2 Traits
Collect 105 MutagenMutagen
Collect 98 Archosaur
Collect 70 Stegosaurus
Collect 9e7 FossilFossil
Photo Archosaur
Collect 59 Ankylosaurus
Collect 97 Ornithischia
Collect 46 Triceratops
Collect 31 Pterosaur
Collect 2e9 FossilFossil
VI Dinosaur:


Stone Geode:
  • MutagenMutagen 32-37
  • Cards 7
  • 3% rare

Gold Geode:

  • MutagenMutagen 128-148
  • Cards 21
  • 6 rare

Diamond Geode:

  • MutagenMutagen 1920-2220
  • Cards 245
  • 40 rare
10/12 Collect 200 MutagenMutagen
Photo Ornithischia
Collect 59 Ankylosaurus
Collect 81 Stegosaurus
Upgrade 4 Traits
Collect 51 Triceratops
Collect 20 Plesiosaur
Collect 40 Pterosaur
Collect 112 Ornithischia
Collect 135 Archosaur
Collect 99 Stegosaurus
Collect 2e10 FossilFossil
VII Traits:

Stone Geode:
  • MutagenMutagen 38-44
  • Cards 9
  • 1% epic
  • 3% rare

Gold Geode:

  • MutagenMutagen 152-176
  • Cards 27
  • 3 epic
  • 9 rare

Diamond Geode:

  • MutagenMutagen 2280-2640
  • Cards 315
  • 45 epic
  • 60 rare
10/12 Collect 77 Stegosaurus
Collect 250 MutagenMutagen
Upgrade 3 Traits
Photo Stegosaurus
Collect 21 Plesiosaur
Collect 79 Ankylosaurus
Collect 138 Archosaur
Collect 50 Pterosaur
Collect 124 Ornithischia
Collect 37 Plesiosaur
Collect 74 Triceratops
Collect 8e10 FossilFossil
VIII Dinosaur:


Stone Geode:
  • MutagenMutagen 45-52
  • Cards 12
  • 1% epic
  • 3% rare

Gold Geode:

  • MutagenMutagen 180-208
  • Cards 36
  • 4 epic
  • 12 rare

Diamond Geode:

  • MutagenMutagen 2700-3120
  • Cards 420
  • 60 epic
  • 80 rare
10/13 Collect 30 Pterosaur
Collect 300 MutagenMutagen
Collect 5 Saurischia
Collect 58 Triceratops
Photo Ankylosaurus
Upgrade 4 Traits
Collect 142 Archosaur
Collect 107 Stegosaurus
Collect 127 Ornithischia
Collect 94 Ankylosaurus
Collect 42 Plesiosaur
Collect 61 Pterosaur
Collect 2e11 FossilFossil
IX Traits:

Stone Geode:
  • MutagenMutagen 53-61
  • Cards 14
  • 1% epic
  • 3% rare

Gold Geode:

  • MutagenMutagen 212-244
  • Cards 42
  • 5 epic
  • 15 rare

Diamond Geode:

  • MutagenMutagen 3180-3660
  • Cards 490
  • 75 epic
  • 100 rare
10/13 Collect 22 Plesiosaur
Collect 2e10 FossilFossil
Upgrade 5 Traits
Photo Triceratops
Collect 126 Ornithischia
Collect 113 Stegosaurus
Collect 62 Pterosaur
Collect 47 Plesiosaur
Collect 158 Archosaur
Collect 33 Saurischia
Collect 106 Ankylosaurus
Collect 90Triceratops
Collect 8e11 FossilFossil


Icon Name Description Requires
Achievement Dawn of the Dinosaurs Dawn of the Dinosaurs The Mesozoic Era began with the Permian-Triassic Extinction Event, the largest documented mass extinction in Earth's history. Separated into three majoy periods - the Triassic, Jurassic, and Cretaceous - this era saw many new developments in geology, climate, and evolution, including the age of dinosaurs. Great Fossil Portal
Achievement Massive Comet Massive Comet 66 million years ago, three quarters of all life on Earth suddenly died. Scientists today believe that this mass extinction event was caused by the impact of an asteroid that ushered in a devestating ecological collapse. But without this disaster the modern world would not exist. Extinction
Achievement Reptilian Relatives Retilian Relatives While they are not the descendents of dinosaurs, crocodilians are the last living archosaurs. Evidence of this can be seen in some traits that distinguish them from other modern reptiles, like their four-chambered heart and cerebral cortex. Crocodilia

Mesozoic Mania[]

Mesozoic Mania was a competition to see fans favorite dinosaurs. It began on April 20, and ended on July 19 2020. The final summary & wrap-up of the event can be found here.

Cell to Singularity: Mesozoic Valley[]

Mesozoic Valley is also available as a stand-alone game Cell To Singularity: Mesozoic Valley, which is available on Coolmath Games. In this version, the Mesozoic Valley is available at the start, and is the only simulation. As such, extant reptiles and birds (Rise of Reptiles) are not unlocked by reaching levels in Mesozoic Valley.


  • Several "dinosaurs" are actually not dinosaurs as they don't belong to the clade Dinosauria.
    • Dinosaurs are archosaurs, but the "Archosaur" is not a dinosaur, it appears to be either an early or basal archosaur or a member of the clade Pseudosuchia. It could also be an Archosaurus, but Archosaurus is not an archosaur.
    • Pterosaurs are not dinosaurs, which is why they are an offshoot of the Archosaur node separate from the mainstream dinosaurs. Pterosaurs are related to dinosaurs, as both belong to the clade Ornithodira.
    • Despite their origins in different clades, the Mosasaurs, Plesiosaurs and Ichthyosaurs are all grouped together as the only aquatic prehistoric creatures on the tree. This is in spite of the fact they are distinctly not Archosaurs but different lineages of reptile, Mosasaurs being Squamates, Plesiosaurs being turtle relatives and Ichthyosaurs belonging to an unknown lineage of Diapsid.
    • The Cynodont is also not a type of dinosaur. Dinosaurs and other Archosaurs (such as the above-listed creatures) are Diapsids whilst Cynodonts are Therapsids. These non-dinosaur creatures are included in the Mesozoic Valley to show the diversity of species during the era, as an example of the other organisms alive at the time. Mammals belong to the clade Cynodontia, but the Cynodont in the game is Thrinaxodon, not a mammal.
  • The Mesozoic portal in the Main Simulation is in the ocean habitat, but if the Lungs upgrade is bought it turns into the habitat that looks similar to the habitat behind the Archosauria trophy.
  • The tree does not accurately reflect dinosaur phylogeny, as Archaeopteryx is actually closest to Velociraptor, with both being paravians, unlike Gallimimus. And Eoraptor is closest to sauropods, as it is a sauropodomorph, not a theropod. And paravians and Gallimimus are maniraptoriforms, unlike Compsognathus.