Bit of a Mega post but just making it to outline to people still confused everything that is in this Halo collection.
Halo CE:Anniversary Campaign. (2 player co-op)
CE:A Old to New Graphics Switching
Halo CE (XBOX 1) Multiplayer in 1080p 60fps (No graphic changes)
Halo CE + PC Maps
Battle Creek Blood Gulch Boarding Action Chill Out Chiron TL-34 Damnation Danger Canyon Death Island Derelict Gephyrophobia Hang 'Em High Ice Fields Infinity Longest Prisoner Rat Race Sidewinder Timberland Wizard
Halo 2 Anniversary Campaign (2 player co-op) completely redone graphics for the campaign, new intro and outro cutscnes, cutscenes replaced with high quality CGI by Blur Studios, Graphic switch feature, New skull(s)?
Halo 2 Multiplayer 1080p 60fps (No graphic changes, possibly superjumping broke)
Halo 2 +DLC* + Halo 2 Vista Maps
Ascension Backwash Beaver Creek Burial Mounds Coagulation Colossus Containment District Elongation Foundation Gemini Headlong Ivory Tower Lockout Midship Relic Sanctuary Terminal Turf Uplift Warlock Waterworks Zanzibar NOTE* Tombstone and Desolation are no included, Issues with how they were distributed
Halo 3 Campaign 1080p 60fps 4 Player co-op (no graphic changes)
Halo 3 Multiplayer with Forge and Theater intact 1080p 60fps (no graphic changes)
Halo 3 Maps + DLC
Assembly Avalanche Blackout Citadel Cold Storage Construct Epitaph (Epilogue) Foundry Ghost Town Guardian Heretic High Ground Isolation Last Resort Longshore Narrows Orbital Rat's Nest Sandbox Sandtrap (SAND TARP) Snowbound (Boundless) Standoff The Pit (Pit Stop) Valhalla
Halo 4 Campaign 1080p 60fps 4 Player Co-op (no graphic changes)
Halo 4 Multiplayer 1080p 60fps + Theater, Forge, Spartan Ops (no graphic changes)
Halo 4 Maps + DLC
Abandon Adrift Complex Daybreak Erosion (Ascent Grifball Court) Exile Forge Island Harvest Haven Impact (Relay) Landfall Longbow Meltdown Monolith Outcast Perdition Pitfall Ragnarok Ravine (Settler) Shatter Skyline Solace Vertigo Vortex Wreckage
NEW HALO Xbox One MULTIPLAYER 1080p 60fps
New engine based on amalgamation of the past engines features, Looks like Halo 4 with Halo 2 features, weapons visible on player bodies. Spartans and Elites playable. Halo 2 weapons.
6 Halo 2 maps completely redone in this Xbox One Engine
Ascension Lockout Zanzibar Unknown Unknown Unknown
Halo 5 Beta.
More info needed
Multiplayer playlists will have gametypes and maps from all 5 Multiplayer titles as voting options. Playlists for specific games will be possible. Campaign playlists will allow players to play things like "every warthog mission from Halo 1-4 one after another" or start at Halo 1 Mission 1 and Play all the way to Halo 4 Final Mission.
Everything unlocked by default, Skulls selectable for every title.