Newgrounds Rumble

Newgrounds Rumble is one of those games that respects your time: open the page, hit play, and you're playing within seconds. It keeps its rules small and its challenge honest, which is a rarer combination than it should be.

Everything runs on keyboard and mouse; give it one round and the controls disappear into muscle memory. Desktop, laptop, phone: the game doesn't care, it just loads and runs. Fullscreen is one click away if you want the full-monitor experience. Worst case, you lose five minutes finding out it's not for you. Best case is considerably longer.