The scrapped Call of Duty Halo collaboration would've seen Halo maps appear in Call of Duty according to leaks.

Crash in Call of Duty 4 offers a fast-paced experience with multiple playstyles and vantage points. Combine in Black Ops 3 promotes constant movement with varied cover options for adrenaline ...

Of course, Das Haus isn’t an old map. It’s from Sledgehammer’s last game, Call Of Duty: Vanguard, but reimagined here as a floor of a skyscraper under construction, making it a cousin to ...