Bullethead

Bullethead is a game released in 2010. Players become Triclopian Creatures fighting in a war against an army of aliens, of which they are heavily outnumbered. The creatures fight off the aliens by shooting bullets from the helmets attached to their heads, thus giving the name "Bullethead". It can also be played as a two player game. The goal is to defeat the group of aliens present in the twenty levels.

Controls
Use the arrow keys (<-) (->) to move the Triclopian left or right. Press the up key (^) to jump. The period key allows the player to shoot the bullets to defeat the enemies. This key, when pressed and held next to a defeated player (if playing the multiplayer mode) can also give that player an extra life.