Livelock

By giving you the choice of shooting your robot enemies or smacking them to pieces, this top-down, twin-stick sci-fi arcade game manages to be two fun games in one. In Livelock, you have to fight a war between intelligent machines who want to wipe out what remains of humanity -- except that we're robotic as well, since Earth has become uninhabitable, and we've all had our minds transferred into machines. To survive, players have to choose among three characters -- two of which use guns, while the third likes to punch things -- as you make your way through the remains of our civilization. But while this largely plays like other fun top-down arcade games, it sometimes comes up a bit short. The levels are often too linear, while the story is rather simple. Even worse, one of the three characters is decidedly less fun than the others -- well, if you play the campaign on its own, that is. But if you play this co-op, that third wheel is actually helpful, since she can heal her compatriots. Even with these issues, Livelock manages to be fun and even addictive, regardless of whether you play it as a hack-and-slash action game or as an arcade-style shooter.