Doom Eternal is packed with nods to its rich history and other beloved games. From nostalgic throwbacks to hidden surprises, these are the ten best Easter eggs and references found throughout the game.

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10. Daisy the Rabbit

• A reference to Doom Guy’s pet rabbit from the original Doom.
• Found in the Fortress of Doom, with a portrait of the Slayer holding Daisy.
• Daisy can also be seen hidden in various levels, appearing as a small environmental detail.

9. The Lava Death Easter Egg

• A returning reference to Terminator 2.
• If you die in lava and exhaust all extra lives, Doom Slayer gives a thumbs-up while sinking, just like the T-800 in T2: Judgment Day.

8. Doom Guy’s Bookshelf

• Located in the Fortress of Doom, his bookshelf is filled with gaming references, including:
  • 50 Shades of Slay
  • The Kako in the Rye
  • Mesa Science Monthly (Half-Life reference)
  • Why I’m So Great by Dork Norcom (Duke Nukem Forever reference)
  • My Buddy Superfly (Daikatana reference)

7. Doom Guy’s Classic PC

• Found in the Slayer’s room, this old-school PC lets you play the original Doom and Doom II.
• Unlock Doom II by entering the password: Flynn Taggart, a reference to the Doom novel series protagonist.

6. The Unmaker Gun

• A weapon from Doom 64, unlocked in Doom Eternal by collecting all six Empyrean Keys.
• Originally planned for the classic Doom, scrapped in favor of the Soul Cube in Doom 3.

5. Classic Cheat Codes

• IDDQD and IDKFA return as collectible cheat codes.
• These famous Doom cheats reference God Mode and full weapons + ammo unlocks.

4. Classic Doom Textures

• While Doom Eternal lacks Doom 2016’s secret levers, classic textures remain hidden throughout levels.
• Often placed in obscure corners, adding a touch of nostalgia.

3. Classic Enemy Designs

• Enemies like Pain Elementals, Arachnotrons, and Archviles closely resemble their original Doom counterparts.
• Pickups like shotgun shells and health potions mimic old-school Doom sprite aesthetics.

2. The Dopefish Lives!

• The Dopefish from Commander Keen makes an appearance in Level 3.
• Found hanging from a fishing rod, this recurring Easter egg has appeared in countless id Software titles.

1. The Icon of Sin (Final Boss Easter Egg)

• A true fight against the Icon of Sin, the final boss from Doom II.
• Includes John Romero’s distorted voice, referencing the backwards speech from Doom II.
• Originally, the Icon of Sin was just a texture on a wall—now it’s a full-fledged boss battle.

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Bonus: Hidden Birthday Balloon

• A birthday balloon can be found in the Super Gore Nest level, a returning Easter egg from Doom 2016.
• Its meaning remains mysterious, but it’s a fun, recurring joke from the developers.

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These Easter eggs showcase Doom Eternal’s deep connection to its history, honoring past games while injecting humor into its brutal gameplay. Have fun hunting them down, and as always, rip and tear!