Platform(s): PC Browser (probably flash)
Genre: RPG/Pokemon like/Adventure
Estimated year of release: I've played it around 2008-2012.
Graphics/art style: Generic RPG dungeon at the start with themed floors.
Notable characters: Pokemon but real animals (mostly), a snake, a bird, and on later floors a red T-Rex. I don't remember the player character almost at all.
Notable gameplay mechanics: Pokemon like battles, few moves, and a party of a few animals. Traveling through themed floors (like a snow area and a red volcanic area with a T-Rex). The floors were separated by difficulty, and the player progressed through them from the bottom to the top.
Other details: I remember the game starts off in a big room with about 8-12 big eggs, and you choose one of them to be your starting animal, each egg was about 2x2 or 3x3 tiles with the player taking up 1 tile. I think the starting pool was mostly a snake and a bird. After that, the player goes to the next room (doors out are top right, and doors in (spawn point) are bottom right with all the eggs on the left). The game had a style that made me think of an RPG in general, with the first room starting in a dungeon. The game had multiple floors, I saw similar floor things in mobile game ads, but I've played this game way before any of those were created. The game was specifically in English (it had a US/UK flag in the corner to indicate the language). I can't find the website it could have been on or what the game could have been called.