All the games in their Steelbook and the BFG replica that comes with them ... every Doom game there has been so far, are Doom, Doom 2, Doom 3, Doom 64, Doom (2016), and Doom Eternal.

Also part of the Doom Anthology SteelBook is an awesome replica of the Doom series' BFG. The gun made a cameo in Quake II ...

DOOM 3, DOOM (2016), and DOOM Eternal Deluxe Edition. The anthology also includes an exclusive SteelBook game case and a 5-inch replica of the BFG, complete with LED lights and a stand.