Even Halo jumped in on the crossovers : r/Doom

Halo: Fireteam Raven (Arcade) - The Game Hoard

How would you do a Halo/Doom crossover?, Page 2

Who else waiting for doom slayer mjolnir armor to arrive in halo infinite?

Unyshek on the potential for a Star Wars Crossover in Infinite (Swipe) : r/ halo

How would you do a Halo/Doom crossover?, Page 2

How to Watch Marvel Movies and TV Shows in Order

They Made a REAL Halo and Doom Crossover

How would you do a Halo/Doom crossover?, Page 2

All Tomorrows crossover: The Qu's Extinction (commissioned by me, drawn by u/spartans_doodles) : r/halo

Master chief x doomguy edit on photoshop I did (re edit) : r/halo

Yellowjackets: Season 1 Theories and Questions

Halo is Infinite, DOOM is Eternal - me (SFM) : r/halo