@Tersione: I remember playing Alien vs Predator. It was fun crawling up the wall and celling, letting yourself fall and biting off marine heads. I can really see that zombiegame. First you begin slow, trying to catch wounded humans (maybe your own family?) then rats and stuff, always evolving and spending you xp on agility, strength, regeneration or toxicity and becoming a runner, hulk, blob or spiter. Muhahaha.
Anybody fit in Godot or Unity? I'm giving my okay for the usage of my ideas, but I own at least 10% of that project. It's okay, if it is an opensource project, but just in case, I get my ownershare of the sales profits (including selling the whole project to somebody else).