Slay the Spire 2 Passes 410,000 Concurrent — Outdrawing a $250M Blockbuster

The launch weekend turned a head-to-head comparison into a parable. Slay the Spire 2 peaked above 410,000 concurrent players on Steam — while Marathon, the same-day release backed by a reported $250 million budget, topped out around 88,000. Indie card game versus AAA shooter; no contest.

The internet's favorite kind of numbers fight, in other words — and Mega Crit, riding the biggest launch in its history, leaned into it with a cheeky social-media post playing up the David-versus-Goliath ledger.

The saga had one more beat — the apology after the gloating read meaner than intended — but the underlying data never got walked back, because it didn't need to be:

• 410K vs 88K on the same launch weekend is a ten-year development story compressed into one chart.
• The original Slay the Spire's formula — $30, no marketing machine, pure word of mouth — scaled rather than faded in its sequel.
• And the spire's numbers kept climbing after the blockbusters' usual launch decay: 500K the next day, 570K by Sunday.

For the deckbuilding genre at large, the weekend was a statement of market size: the audience that made Slay the Spire a classic hadn't just persisted for seven years — it had multiplied, and it showed up for the sequel in numbers the genre had never seen.

Keep reading:

• Ten Times the Original: 500K Concurrent
• The Marathon Joke Apology