A first-person shooter. Includes the ability to move back and forth between levels, and features a few puzzle and adventure elements.

The Shadow Warrior Demo from the 3D Realms FTP server.

A six-axis FPS where the aim is to shatter all the bats before the time runs out, while avoiding Mister Bob. Includes a preview of the cancelled game, Sanctity.

Ported by MacPlay. This is sin. When the CEO of SinTEK Industries begins injecting the streets with a DNA-altering drug, it's time to reassess the laws of morality. When the same twisted bio-chemist plans to overtake the world with her...

A cartoony shooting gallery game about taking on an army of evil dolls.

Ported by Aspyr. Lock and load. One blast from destruction, the U.S.S. Voyager is mysteriously transported into a hull space infested with danger. As part of Voyager's elite Hazard Team, you must defend it from a host of scavenging aliens,...

Super Maze Wars is a well remembered first person labyrinth shooter from 1993, having come pre-installed on a number of Macs in the mid 90's. This game is notable for its networkability.

System Shock is a FPS in a sci-fi environment a la Marathon, except your ennemy is artificial intelligence and it's turning humans into mutants.  You need to stop the mad AI before it takes over the world.  System Shock included some...