Cover art

Box art refers to the artwork of the packaging of a game.

Doom
On the Doom boxart, the Doomguy is standing on a rock, fighting off Barons of Hell, and one of them is grabbing the Doomguy's wrist.

Doom II: Hell on Earth
On the Doom II boxart, the Doomguy is fighting with a Cyberdemon using the chaingun. This boxart was parodied in Jazz Jackrabbit 2 in the episode selection screen.

The Ultimate Doom
Same as the Doom boxart, but has "The Ultimate" written on top of the Doom logo.

Master Levels for Doom II
The Master Levels for Doom II boxart shows a grey hellish background.

Final Doom
The boxart of Final Doom depicts the Doom logo written in yellow with "Final" written on top of it in a black background.

Doom 64
The boxart of Doom 64 shows a red demonic face with "Doom 64" on top of it.

Doom 3
The boxart of Doom 3 depicts a Hell Knight behind the Doom logo.

Doom 3: Resurrection of Evil
The boxart of Doom 3: Resurrection of Evil depicts the Maledict under the Doom logo.