Metal Slug

The Metal Slug game, originally released in 1996, “is widely known for its sense of humor, fluid hand-drawn animation, and fast paced two-player action.” ScrewAttack takes a look back at this title after the break.

The player has to constantly shoot at a continual stream of enemies in order to reach the end of a level. At the end of each level, the player must confront a boss who is often considerably larger than regular enemies and takes many shots to defeat.

[via Wiki]