A landmark first-person shooter released in 1996 known for its interactive environments, humor, and fast-paced action. It pushed the genre forward with level interactivity and memorable one-liners.
- Developer: 3D Realms (Build engine by Ken Silverman)
- Genre: First-person shooter
- Platforms: MS-DOS (1996), later on Windows, Mac, Nintendo 64, PlayStation, Sega Saturn, and modern ports/remasters
- Notable mechanics: Interactable environments, jetpack and pipe bombs, keycard progression, secret-laden maps
- Reception: Critically acclaimed; influential in 90s FPS design and modding scene