Slay the Spire 2 Surges in Early Access With Nearly 400K Concurrent Players

Launch momentum snapshot

Slay the Spire 2 opened in Early Access with one of the strongest first-day performances seen for a premium deckbuilding title on Steam. In a March 6, 2026 report, Kotaku cited the game peaking at 399,273 concurrent players, while user sentiment on Steam sat around 97% positive at the time of publication. For an unfinished build, that level of engagement is unusually high.

What the available figures show

Peak concurrent users: 399,273 on Steam (as cited by Kotaku).

User reception: about 97% positive among thousands of English-language reviews in the same early window.

Storefront position: the game reportedly rose into the top tier of Steam’s most-played chart, behind long-running giants like Counter-Strike 2, Dota 2, and PUBG.

Platform scope: PC-first Early Access, with no console release available at that stage.

Why this is a high-signal release story

The data suggests demand came from both returning fans and new players willing to buy into an Early Access roadmap. The sequel appears to have followed a conservative product strategy: expand core systems, increase content breadth, and add co-op functionality without radically replacing the original formula. That tends to reduce execution risk while still giving the community meaningful reasons to upgrade.

However, first-day concurrency does not guarantee long-tail retention. The next performance phase will likely depend on how quickly Mega Crit ships balancing updates, event/card variety improvements, and communication around roadmap milestones. In other words, the launch metrics show an excellent opening velocity, but sustained health will be decided by post-launch cadence and trust in iterative development.

Source attribution: Reddit r/pcgaming post linking to Kotaku (published March 6, 2026) and the Steam metrics quoted in that article.