Back when Nintendo hosted their most recent Nintendo Direct event it was announced that they would be pairing DOOM 64 with DOOM Eternal as a pre-order bonus. Now things have changed.
Fans of the DOOM series were a bit salty that only Nintendo Switch users were getting the DOOM 64 pre-order bonus with their copy of DOOM Eternal. But now Bethesda has changed their stance, giving ALL pre-order purchases of DOOM Eternal a copy of DOOM 64 no matter what platform.
DOOM Eternal pre-order will not only get a copy of DOOM 64, but also the "Rip and Tear Pack" which includes a DOOT Revenant player skin, Throwback Shotgun Weapon Skin, Cultist Base Master Level, a remix of the main game's Cultist Base Level and some other stuff. DOOM Eternal will be arriving on PC, Xbox One and PS4 on March 20, 2020.