Revision 6

Tears of Metal is designed from the ground up as a co-op experience. Players can join together online with up to three additional friends for a full four-player campaign. The game also supports solo play, making co-op an option rather than a requirement.

Online Co-op

Online co-op supports up to four players simultaneously. Each player controls their own playable hero, and different hero combinations can create powerful team synergies when combined with compatible artifact builds. The game uses online multiplayer only; no local split-screen co-op has been announced.

Sessions are hosted rather than server-based, and open games appear in a Public Lobbies list. A launch-day hotfix stopped lobbies for campaigns that had already started from appearing there.

Cross-Platform Play

Cross-play between the Steam build and the Microsoft Store build shipped with Early Access. A hotfix on launch day, July 22, 2026, repaired an issue that was stopping players from using multiplayer cross-play at all, and the Microsoft Store product record lists cross-platform multiplayer and cross-platform co-op among the game's capabilities.

Cross-play compatibility depends on both parties running the same build, and Steam updates are approved faster than the Microsoft Store and Game Pass versions. Every patch from July 24, 2026 onward has therefore shipped with cross-play temporarily disabled on the default Steam branch while the matching Microsoft Store build catches up. Paper Cult publishes a Steam beta branch named crossplay that stays matched to the Game Pass version, so players who mainly play cross-platform can sit on that branch and receive updates slightly later rather than losing cross-play. The studio has noted that staying on the older branch means missing newer save-safety work.

Separately, the game supports Xbox Play Anywhere, so a single Microsoft Store purchase covers both Xbox Series X|S and Xbox on PC, and progress carries between them. Play Anywhere is a purchase and save-sync feature rather than a cross-play feature; the two are independent.

Challenge Shop Co-op

The Challenge Shop mode, unlocked after defeating the boss Gilles the Hog, supports the full co-op party of up to four players. This high-difficulty mode is designed to be tackled solo or with friends for greater rewards.

Progression in Co-op

In co-op sessions, players share the same campaign run and must coordinate artifact selection, soldier management, and combat strategy. Permanent soldier losses apply across the shared campaign, so the whole party must work together to protect experienced troops and advance through increasingly difficult environments.

Early Access Caveats

Paper Cult describes online multiplayer as fully supported in the Early Access build while noting that it is still being balanced and stabilised, and multiplayer stability was the explicit focus of the second open beta in 2025.

Desync is the most-reported multiplayer problem since launch. The studio traced it largely to players connecting through distant relay servers, or to hosts on less stable connections, and named networking optimisation one of its two top priorities alongside mid-run saving. As of the August 1, 2026 patch the networking work had been written and was still in testing rather than shipped. A number of multiplayer crashes and freezes are attributed to the same networking layer rather than to the game logic.

Co-op sessions include in-game chat, and both storefront listings flag in-game chat and online interactivity as elements that no age rating covers.