The Mesozoic Valley is a side simulation featuring the evolutionary history of prehistoric creatures throughout the Mesozoic Era. It primarily includes various species of dinosaur, but also includes some non-dinosaur prehistoric creatures. This expansion explores the evolution of dinosaurs from archosaurs, through their extinction in the Cretaceous-Paleogene Extinction Event, and into their eventual evolution into modern birds.
This part of the game is represented by mascot Archie the Archosaur.
A Mysterious Rock appears on the Main Tree once the Flatworm is unlocked. Repeatedly tapping on the Rock destroys it and unlocks the Mesozoic Valley: a new, separate simulation, in which a separate tech tree can be found. Advancing this second simulation provides speed increases to the main simulation, and eventually unlocks additional generators.
The Mesozoic Valley begins with a single dinosaur node, with more species unlocking as you advance in rank. 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.
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.
"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 (Parasaurolophus)||60||60||3s||2, 6|
|Ankylosaurus||8,640||4,320||12s||Lvl 2||3, 5|
|Triceratops||103,680||51,840||24s||Lvl 3||4, 8|
|Pterosaur||1.24 M||207,360||18s||Lvl 4||5, 10|
|Plesiosaur||14.93 M||2.2 M||36s||Lvl 6||7, 12|
|Saurischia (Ceratosaurus)||179.16 M||5.16 M||14s||Lvl 8||9, 12|
|Sauropoda (Apatosaurus)||2.15 B||235.82 M||120s||Lvl 10||11, 14|
|Theropoda (Dilophosaurus)||25.80 B||167.8 M||16s||Lvl 12||13, 16|
|Compsognathus||309.58 B||223.69 M||4s||Lvl 14||15, 18|
|Velociraptor||3.72 T||6.71 B||20s||Lvl 16||17, 19|
|Pachycephalosaurus||44.58 T||71.58 B||40s||Lvl 18||19, 22|
|Gallimimus||534.97 T||76.36 B||8s||Lvl 20||21, 24|
|Archaeopteryx||6.42 Qa||1,53 T||30s||Lvl 22||23, 26|
|Brachiosaurus||77.04 Qa||61.06 T||200s||Lvl 24||25, 28|
|Tyrannosaurus Rex||924.42 Qa||162.82 T||100s||Lvl 26||27, 28|
|Spinosaurus||11.09 Qi||782.86 T||90s||Lvl 28||29, 30|
|Iguanodon||133.12 Qi||2.23 Qa||48s||Lvl 30||31, 32|
|Ichthyosaur||1.60 Sx||7.41Qa||30s||Lvl 33||34, 35|
|Cynodont (Thrinaxodon)||19.17 Sx||26.36 Qa||20s||Lvl 36||37, 38|
|Eoraptor||230.02 Sx||281.16 Qa||40s||Lvl 39||40, 41|
|Mosasaurus||2.76 Sp||9.00 Qi||240s||Lvl 42||43, 44|
|Argentinosaurus||33.12 Sp||63.98 Qi||320s||Lvl 45||46, 47|
|Giganotosaurus||397.5 Sp||533.16 Qi||500s||Lvl 48||49, 50|
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.
For each Trait, as you level it up using more cards, it will follow one of a few different paths:
- The first upgrade automates a dinosaur so it will produce fossils without tapping.
- Further upgrades double production speed.
Doubles payout each upgrade.
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||50,000 Mutagen (x 4096)||x 7|
|13||5,000||100,000 Mutagen (x 8192)||x 7.5|
|14||10,000||200,000 Mutagen (x 16384)||x 8|
|15 and more||10,000||400,000 Mutagen (x2 by level)||+0.5 by level|
The current (11/2020) maximum level for a card upgrade is 20.
|Dinosaur||Speed Path||Payout Path|
|Archosaurs||Opisthopubic Pelvis||Propubic Pelvis|
|Triceratops||Nose Brow Horns||Frill|
|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|
|Iguanodon||Thumb Spikes||Changing Posture|
|Ichthyosaur||Live Birth (Viviparous)||Large Eyes|
|Eoraptor||Heterodont Dentition (Omnivore)||True Fossil|
|Argentinosaurus||Accelerated Growth||Giant Vertebrae|
- 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.
- 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.
Unlocking in primary simulation
Reaching certain ranks will unlock the following generators for the primary simulation as part of the Rise of Reptiles branch:
- Rank 3 - Turtle
- Rank 6 - Crocodilia
- Rank 10 - Lizard
- Rank 15 - Snake
- Rank 23 - Galliformes
- Rank 28 - Anseriformes
- Rank 33 - Palaeognathae
- Rank 38 - Neoaves
- Pterosaurs, Plesiosaurs, Mosasaurus, and Ichthyosaurus are not dinosaurs, which is why they are offshoots of the Archosaur node separate from the mainstream dinosaurs. These creatures belong to sister clades of dinosaurs.
- Despite their origins in different clades, the Mosasaur, Plesiosaur, and Ichthyosaur are grouped together as the only aquatic prehistoric creatures on the tree.
- The Cynodont is also not a type of dinosaur, but a proto-mammal. 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.