December brings five fresh day-one Xbox Game Pass drops, with Routine, Marvel Cosmic Invasion, Lost Records, Dome Keeper, and A Game About Digging A Hole all locked in with confirmed dates. The mix covers horror, co-op action, story-driven adventure, strategy, and a weird little indie, which makes this an easy month to fill a backlog without spending extra.
Best New Xbox Game Pass Games December 2025: Full Lineup
Here is the confirmed December list for Xbox Game Pass so far. Only titles with clear dates and explicit Game Pass support are included.
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Marvel Cosmic Invasion – December 1 (Console, PC, Cloud; day one)
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Lost Records: Bloom & Rage – December 2 (Xbox Series X|S, PC, Cloud; day one)
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Routine – December 4 (Xbox One, Series X|S, PC; day one via Game Pass Ultimate/PC)
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A Game About Digging A Hole – December 9 (Console, PC; day one)
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Dome Keeper – December 9 (Series X|S, PC, Cloud; day one)
These dates line up across Xbox news posts, Game Pass tracking hubs, and coverage from major outlets, which keeps this list clear of guesswork or rumored additions.
Routine and Marvel Cosmic Invasion: Early-Month Highlights
Routine lands on December 4 as a first-person sci‑fi horror game set on a derelict lunar station, developed by Lunar Software and published by Raw Fury. Release date trailers, Xbox Wire, and coverage from Windows Central confirm that Routine hits Xbox Serieshits Xbox Series X|S, Xbox One, and PC with day-one Game Pass access for Ultimate and PC subscribers, plus pre-load sitting just under 9 GB.
Marvel Cosmic Invasion kicks things off on December 1 with a beat ’em up built around Marvel characters, online co-op, and pixel-art combat. Xbox’s “Next Week on Xbox” post and platform roundups list it as a day-one Game Pass release across console, PC, and cloud, so this is the obvious pick if a group lobby is the priority.
Lost Records and Dome Keeper: Story and Strategy Picks
Lost Records: Bloom & Rage drops on December 2 and aims squarely at players who want a narrative-heavy session instead of constant combat. Platform listings show support for Xbox Series Xbox Series X|S, PC, and cloud, with Game Pass coverage treating it as the “weekend story playthrough” in this batch.
Dome Keeper arrives a week later on December 9 and blends roguelike mining with dome defense, where quick digging runs feed into upgrade choices between incoming waves. TrueAchievements and Game Pass previews confirm it as a day-one addition for Xbox Series XXbox Series X|S and PC (plus cloud for higher tiers), already carrying strong word-of-mouth from its earlier PC release.
A Game About Digging A Hole and How to Choose What to Play
A Game About Digging A Hole joins Game Pass on December 9 as a small, experimental indie focused on digging and progression rather than complex systems. It first appeared on Steam earlier in the year and picked up positive impressions, which is why Game Pass trackers flag it as a neat “try-it-for-an-hour” option once the bigger releases are done.
For this month, horror fans can start with Routine, co-op squads can lock in Marvel Cosmic Invasion, story enjoyers get Lost Records, strategy players can dig into Dome Keeper, and everyone else can poke at A Game About Digging A Hole as a wildcard. That mix keeps Best New Xbox Game Pass Games December 2025 relevant through the whole month without leaning on leaks or unconfirmed titles.
