Mecha Rats vs Mutant Roaches

Background:

The game is set in a post apocaliptic world where the only surviving species are rats, that evolved to use technology to their advance, enhancing their own bodies to become killing machines, and roaches, genetically altered who constantly evolve to generate new ways of combat, this two factions are in constant war. 

Gameplay:

The player will start the game playing for the rats, as it kills roaches it helps rats to spread more, this puts pressure into the roaches who evolve and adapt. The game is a roguelike, and as soon as the player dies he changes faction, and uses pressure points that came from the spread of the previous faction.