Doom + Doom 2

Official description: Developed by id Software, and originally released in 1993, DOOM pioneered and popularized the first-person shooter, setting a standard for all FPS games. The critically acclaimed sequel, DOOM II, followed in 1994. Now the definitive, newly enhanced versions of DOOM + DOOM II are available as a combined product.

Owners Receive: DOOM, DOOM II, TNT: Evilution, The Plutonia Experiment, Master Levels for DOOM II, No Rest for the Living, Sigil, Legacy of Rust (a new episode created in collaboration by id Software, Nightdive Studios and MachineGames), [and a] new Deathmatch map pack featuring 26 maps

Altogether, there are a total of 187 mission maps and 43 deathmatch maps in DOOM + DOOM II.