Shadow Warrior
Great at first, shitty performance. Between 20 and 110 fps, worst when indoors in small rooms with no enemies. Explain that.
Special moves require joystick inputs on the controller, work about 20% of the time, so you get swarmed. Stops loading when Alt+Tab, waves of enemies become repetitive, scripting broke making me restart a level twice.
Played half of it, had enough.
The Ballad of Gay Tony
Managed to fix most of the performance issue by enabling the Steam overlay. From 18 fps super choppy to about 40 fps. Explain that. Just got tired of the nonsense missions for no reasons, just because explosions. Too random and dumb for me, very little characterization. A big step down from GTA IV for me. Played about half.
Lovely Planet
Has to be played with a mouse and it's not comfy for me, so the quick turn-around shoot two enemies while in mid-air just broke my will. Good design and music, though.