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Stack Mates is a co-op puzzle-platformer for 2-8 players built on teamwork and pure chaos. Shift your form between horizontal and vertical, climb on your friends, and reach the portal together. Remember, if even one person fails, everyone starts over!

Player counts over time, as we observed them.
Source: Steam Web API, ISteamUserStats/GetNumberOfCurrentPlayers. Full methodology
| Month | Average | Change | Change % | Peak |
|---|---|---|---|---|
| October 2026Oct 2026 (from 27 Oct) | 0 | — | — | 0 |
Average and peak concurrent players each month, and the change in average players from the month before.