Covering my next browser games is a game called "Dead Awaken". Its a game about a post apocalyptic world where zombies are fighting humans or the other way around whichever faction you support. You get to train stats and skills, search the graveyard for items and money, kill people or zombies. And when you get to a certain level, you will get noticed by some guild (they're called mob or hordes in this game) and they'll take you under their wing where you'll get lots of cool stuffs. And as an incentive, for every new day you login, you will get stats to train your character even more.
Click here to try it out.