Slay the Spire 2 achieved immediate success, securing a top sales position on its release day. As further data has come to light, it’s increasingly evident that the game’s launch marks a historic achievement. Data analytics firm Newzoo indicates that StS 2 stands as the highest-performing deckbuilder ever, outperforming competitors by a significant margin.
Although peak concurrent users on Steam isn’t a perfect indicator of a game’s long-term vitality, it vividly illustrates the enormous gap between Slay the Spire 2 and other leading card games. For instance, Balatro reached 44,000 concurrent players in January 2025, the original Slay the Spire hit 57,000 in December 2025, and Monster Train 2 saw 18,500 users soon after its May 2025 debut. Remarkably, just three days into its early access period, Slay the Spire 2 soared to 575,000 concurrent players.
Newzoo analysts highlighted the game’s impressive performance, noting it achieved “more than 13 times Balatro’s peak.” This occurred despite Slay the Spire 2 being a $24.99 paid Early Access title without a console release. Developer Mega Crit confirmed initial sales of 3 million copies within the first week, translating to an estimated gross revenue of $75 million before platform fees.
Concurrently, Newzoo’s internal tracking of active users across both PC and console platforms revealed Balatro as the frontrunner among deckbuilders and card battlers, boasting around 1.76 million monthly active users from January 2025 to February 2026. Nevertheless, preliminary daily active user statistics for Slay the Spire 2 indicate it is poised to dominate this genre by a considerable margin.
Even with its availability limited solely to Steam, Slay the Spire 2 sustained an average of 1.08 million daily users over its initial 11 days, showing no signs of declining engagement, as per Newzoo’s findings.
Newzoo definitively states that, in terms of concurrent player numbers and first-week sales, Slay the Spire 2 has set a new benchmark as the highest-performing deckbuilder ever recorded.
Newzoo attributes Slay the Spire 2’s unparalleled launch success to several contributing factors. A primary reason is the accumulated seven years of player anticipation, as the original Slay the Spire “had no sequel, no spin-off, no dilution.” This meant that every player who completed StS1 and yearned for more content had patiently awaited a follow-up, with no alternative options to fill that void.
It’s probable that the number of such dedicated players surpassed earlier estimates. Newzoo observes that since StS1 is a purely single-player experience, it “does not generate drama, discourse, or content creator spectacle proportional to its actual installed base.” Therefore, measuring collective excitement among players who quietly invest countless hours into ascension runs can be challenging.
Slay the Spire 2 presents an intriguing comparison with Silksong, a game that established a significant cultural presence even before its release, boasting approximately 2.4 million monthly active users on PC. Newzoo pointed out that “StS2, with a fraction of the noise, is tracking close to that” level of engagement.
Mega Crit’s established reputation as a reliable developer also appears to be a factor. The original StS1 fostered considerable consumer trust, thanks to its early access phase being free from microtransactions, season passes, or development controversies. Mega Crit assured players that the sequel would follow the same transparent approach, even if some players expressed willingness to purchase cosmetic items.
According to Newzoo, in a gaming market often weary of aggressive monetization practices, this transparent approach serves as a powerful incentive for player conversion.
In a conversation, Mega Crit co-founder Casey Yano suggested that StS2 has transcended its niche, believing its solid reputation is now attracting challenge-seeking players who might not typically gravitate towards a roguelike deckbuilder.
Yano elaborated on this, stating, “As a highly competitive gamer, if a game is described as difficult, regardless of its genre—like a racing game with compelling competitive elements or creative self-expression opportunities—it would capture my interest, even if I don’t typically play racing games.” He concluded, “I believe we are beginning to appeal to a new demographic of players.”