Originally released in 1990 (and ported to the Sega Genesis in 1992), Corporation was one of the earliest first person shooters. Unlike most later games in the genre (which Wolfenstein 3D popularized two years later), the player doesn't aim at the center of the screen, but with the mouse cursor which could move freely around (while controlling the character's movement with a joystick). System Shock would use a similar targeting model in 1994.
Apart from the shooting, the game has some rudimentary RPG mechanics, including character stats: the player can choose between four (or six, depending on the version) characters at the beginning of the game with varying base stats. The protagonist can be enhanced further with cybernetic implants, and the game also has a weight-based inventory system. At the beginning of the game, and at various points over the campaign, the player gets a budget with which to buy equipment that can be assigned to inventory slots on the character's body.