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Upcoming Co-op Games in September 2026: 3 Confirmed Releases

Plan September around three confirmed co-op releases, with exact dates, platforms, player counts, local and online modes, and unanswered buying questions.

By Gamersok Editorial Team
Gaming controller beside a September calendar marked with three release dates
Original Gamersok editorial artwork
#upcoming-co-op-games#september-2026#release-dates#local-co-op
Table of contents13 sections

Three notable co-op games have confirmed September 2026 release dates: Crimson Moon on September 1, Trine 6: Together in Time on September 17, and Minecraft Dungeons II on September 29. They solve very different group needs, from a focused two-player online hunt to four-player couch and online adventures across several platforms.

This guide reflects official information available on August 21, 2026. Release plans can change, and several important details—especially exact crossplay combinations and online copy requirements—remain unconfirmed. Treat those gaps as buying questions, not promises.

September 2026 co-op releases at a glance

Release dateGameConfirmed platformsCo-op playersConfirmed modesBest fit
September 1Crimson MoonPC, PS5, Xbox One, Xbox Series2OnlineA pair that wants replayable action-RPG hunts
September 17Trine 6: Together in TimePC, PS5, Xbox Series, Switch, Switch 2Up to 4Local and onlinePuzzle-platforming groups that need flexible couch or remote play
September 29Minecraft Dungeons IIPC, PS5, Xbox Series, Switch, Switch 2Up to 4Local, online, and matchmakingFamilies and mixed-skill groups that want an accessible action RPG

Only the listed modes and platforms are confirmed here. “Online co-op” does not automatically mean crossplay, and a local mode does not prove that several local players can join an online group. Check those combinations again near launch.

September 1: Crimson Moon

Crimson Moon is a gothic action RPG from ProbablyMonsters built around repeatable hunts, melee combat, gear, and boss encounters. Its official PC, PlayStation, and Xbox store pages confirm solo play and two-player online co-op.

Co-op hunts scale for two players and use a shared team life pool. A fallen partner can be revived, but each death moves the pair closer to failing the hunt. That structure makes Crimson Moon the most focused two-player option in this calendar: it is designed around repeated missions rather than a four-player party or couch session.

An armored Nephilim facing a winged demon during a Crimson Moon huntOfficial Crimson Moon screenshot © ProbablyMonsters

What is confirmed

  • Release date: September 1, 2026.
  • Platforms: PC, PS5, Xbox One, and Xbox Series X|S.
  • Player setup: solo or two-player online co-op.
  • Standard-edition launch price: $19.99 in the official US announcement.
  • A post-launch content expansion is included with the Deluxe Edition, but the announcement does not provide its release date.

What to verify before buying

The current announcement does not list local or split-screen co-op. It also does not explain whether each online player needs a purchased copy, how campaign or hunt progress is shared, or whether joining requires an additional ProbablyMonsters account.

The game is available across several platform families, but the official pages do not publish a complete PC–PlayStation–Xbox crossplay matrix. The Xbox listing specifically labels Xbox cross-platform co-op, which is not enough evidence to promise crossplay with PC or PS5. PlayStation players need PlayStation Plus for online play, while Xbox console players need an eligible online multiplayer subscription.

Best for: two players on a confirmed compatible platform who want combat-focused online sessions and are comfortable checking the exact cross-platform pairing before buying separate versions.

September 17: Trine 6: Together in Time

Trine 6: Together in Time is a co-op-first puzzle platformer from Frozenbyte. Its official press kit confirms solo play plus local couch and online co-op for up to four players. The announced platforms are Steam and Epic Games Store on PC, PS5, Xbox Series X|S, Nintendo Switch, and Switch 2.

That combination gives Trine 6 the most flexible setup of September's three releases. A household can share one system locally, while remote friends can use the online mode. Five playable heroes are planned, including two new heroes for the series, so groups will be combining different abilities rather than controlling identical characters.

Two Trine 6 heroes swinging through a lush puzzle area filled with hazardsOfficial Trine 6 screenshot © Frozenbyte

What is confirmed

  • Release date: September 17, 2026.
  • Platforms: PC, PS5, Xbox Series X|S, Switch, and Switch 2.
  • Player setup: solo or up to four players.
  • Co-op modes: local couch and online.
  • The official press kit still lists the regular price as TBD.

What to verify before buying

Frozenbyte's current factsheet does not confirm crossplay. Do not assume that a PC player can join someone on PS5, Xbox, or Nintendo simply because online co-op exists on each platform.

The press kit also does not specify whether local players can join the same online session, how save ownership works, or whether the Switch and Switch 2 versions connect with each other. Those details matter for a group split across households or Nintendo generations.

Best for: two to four players who want puzzle solving and need the choice between one-screen couch play and separate online systems.

September 29: Minecraft Dungeons II

Minecraft Dungeons II is an action RPG from Mojang Studios and Double Eleven. Mojang confirms parties of up to four, while Xbox's current preview describes local multiplayer, online friends, public matchmaking, and combinations of those arrangements.

The announced release covers Steam, Xbox Series X|S, PS5, Nintendo Switch, and Switch 2. It will also launch through Game Pass on Xbox and PC, and Xbox Play Anywhere supports one digital Xbox purchase across eligible Xbox console and Windows PC use for the same account.

Four heroes charging through a dungeon in Minecraft Dungeons II artworkOfficial Minecraft Dungeons II artwork © Mojang Studios and Xbox Game Studios

What is confirmed

  • Release date: September 29, 2026.
  • Platforms: PC, PS5, Xbox Series X|S, Switch, and Switch 2.
  • Player setup: solo or a party of up to four.
  • Co-op options: local multiplayer, online friends, matchmaking, and some combined local/online arrangements.
  • Game Pass availability: day one on Xbox and PC.
  • The Steam listing includes online co-op, shared-screen co-op, and cross-platform multiplayer.

What to verify before buying

The official Minecraft FAQ does not yet publish an exact crossplay matrix. Steam's feature label indicates cross-platform multiplayer, but it does not answer whether every console family can join every other family or whether a Microsoft account is required on all platforms. Wait for Mojang's platform-specific setup guidance before arranging a mixed-system launch group.

Also verify how many local players each version supports, whether a local party can join a remote party on every platform, and how progression behaves when moving between systems. Xbox Play Anywhere is not the same as universal cross-progression or a license for unrelated accounts.

Best for: up to four players who want an approachable loot-focused action RPG, especially an Xbox or PC group already using Game Pass.

Which September co-op game fits your group?

Choose Crimson Moon if the group is exactly two online players and wants repeatable boss hunts at a lower announced entry price. If the players use different platform families, wait for a complete crossplay confirmation.

Choose Trine 6 if local couch play is essential, the group wants puzzles rather than loot grinding, or someone uses Switch alongside current consoles. It is the clearest option for four people sharing one system, but cross-platform online support still needs confirmation.

Choose Minecraft Dungeons II if the group wants an action RPG that supports up to four, public matchmaking is useful, or Game Pass already covers the planned Xbox or PC setup. It has the broadest announced platform list alongside Trine 6, but exact crossplay pairings should be checked before buying several versions.

If your group needs something immediately instead, compare the best currently available crossplay co-op games rather than planning around an unreleased title.

A launch-week verification checklist

Recheck each game during its launch week. Store descriptions and support pages are more likely to contain the final operational details by then.

  1. Confirm that the release date has not moved in your region.
  2. Check the exact cooperative player limit for local and online modes separately.
  3. Look for an official crossplay compatibility table, not only a broad multiplayer label.
  4. Confirm whether each online system needs its own copy or licensed access.
  5. Check PlayStation Plus, Xbox Game Pass multiplayer, or Nintendo Switch Online requirements.
  6. Verify required publisher accounts and child-account restrictions.
  7. Decide who owns the campaign save and whether progress follows guest players.
  8. Match editions and required downloadable content before sending invitations.

The general guides to co-op copy requirements and online multiplayer subscriptions explain why these are separate checks.

Sources