Slay the Spire 2 has launched to massive success on Steam, attracting 430,456 concurrent players within its first 24 hours. The roguelike deckbuilder sequel rocketed to the top of Steam's sales chart, surpassing both Marathon and Resident Evil Requiem for revenue on March 6, 2026. Developer Mega Crit celebrated the game's performance, noting it achieved the highest concurrent player count ever for a roguelite.

The indie sequel builds on the original's formula with new characters, cards, abilities, and secrets. A standout addition is the four-player co-op mode, which appears to have been well-received rather than feeling tacked on. With a 97% positive review rating on Steam, the game seems to have successfully expanded the franchise while maintaining what made the first game great.

This launch performance demonstrates the enduring appeal of the Slay the Spire franchise and validates Mega Crit's decision to expand the game's scope. The strong player numbers and critical reception suggest the studio has struck the right balance between innovation and preserving the core gameplay that fans loved in the original.