If you like unity 3d horror games with zombies, then you will like to play Inhuman, also. In Inhuman, you are the only one left alive in an abandoned city and you must fight against an army of zombies who are starving for your fresh brain. On start, you have only two weapons: a gun and a bat with spikes. Kill as many zombies as you can and try to survive as long as possible. Have fun.
To play Inhuman, you will use W,A,S,D keys and mouse to move, 1 and 2 keys to switch weapons, R key to reload, SPACE bar to jump, Ctrl key to crouch and Shift key to sprint.