Doom's new expansion quietly hides a whole classic Doom 2 inside it

id Software's first major expansion for Doom: The Dark Ages arrived July 7, 2026 at $19.99, and on paper it's a straightforward good deal — a 10 to 12 hour single-player campaign that id says is larger than both Doom Eternal expansions put together. But the detail worth the attention of anyone who cares about game history is the one buried in the feature list: Revelations includes fully playable, engine-rebuilt maps from classic Doom 2, presented in-fiction as the Slayer's memories.

Preservation disguised as DLC

This is a genuinely clever bit of game preservation. Rather than bundling an emulated copy of a 1994 game as a menu curiosity — the usual approach — id rebuilt classic Doom 2 levels inside the modern engine and wove them into the fiction as the Slayer's memories. You're not launching a separate old executable; you're playing 1994 level design with 2026 rendering, framed as narrative. It's the difference between putting a painting in a storeroom and hanging it in the main gallery.

The rest of the expansion

The new content proper is built around six levels connected by a Metroidvania-style hub area named Purgatory — a structural departure for a series built on linear corridors of violence. There's also a new weapon, the Chain Spear, which grapples and yanks enemies toward you, feeding the aggressive forward-pressure design the modern Doom games are built around. For $19.99, a 10-12 hour campaign is generous by 2026 expansion standards.

The nostalgia play here is smarter than most. Studios usually monetise their history with a straight remaster; id used its history as texture inside a new game, which serves both the people who played Doom 2 in 1994 and the ones who've never touched it. That's the version of a franchise history lesson that actually lands.