Kill! Zone - The Doom Wiki at

Kill! Zone, Episode 1: "The Trek Begins", is a Doom II episode replacement mod of seven levels, created by Donald R. Howard and Heuristic Software in 1996. The WAD uses original soundtrack composed by Scotty Ray Warren, Chris Torgersen, Bob Reganess and David W. Keefer.

Guardian of Hell, Doom Wiki

Hell Guard, Doom Wiki

Plasma gun - The Doom Wiki at

Harbinger of Doom Divinity Original Sin 2 Wiki

Sony PlayStation - The Doom Wiki at

Immora - The Doom Wiki at

Hell To Pay - The Doom Wiki at

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Rocket launcher - The Doom Wiki at

BFG9000 - The Doom Wiki at

E2M2: Containment Area (Doom), Doom Wiki

Killzone 2 - Wikipedia