Slay the Spire Steam Revenue & Sales Estimates

Based on our analysis using the Boxleiter method, we estimate Slay the Spire's total gross revenue on Steam at approximately $77,868,734.

This estimate comes with a confidence range:

• Conservative estimate (x20): $51,912,490
• Calibrated midpoint (x30): $77,868,734
• Optimistic estimate (x60): $155,737,469

The actual revenue may vary due to regional pricing, seasonal discounts, and refund rates.

With 182,277 Steam reviews and a 98% positive rating, we estimate Slay the Spire has sold between 3,645,540 and 10,936,620 copies, with a best estimate of 5,468,310.

This is based on the Boxleiter method, which uses the observation that roughly 1 in every 20 to 60 buyers leaves a Steam review. For the midpoint we do not assume a universal 30x value; we use a calibrated multiplier of x30 that adjusts for the title's age, price tier, genre, and review profile.

After Steam's tiered platform fee of effectively 23.9%, Mega Crit keeps an estimated $59,294,988 from Slay the Spire's gross revenue of $77,868,734.

Here's the breakdown:

• Gross Revenue: $77,868,734
• Steam's Fee (23.9%): -$18,573,747
• Developer Revenue: $59,294,988

Note: This doesn't account for publisher shares, taxes, or development costs.

Steam uses a tiered revenue sharing model that reduces the platform's cut as a game earns more:

• First $10 million: 30% to Steam, 70% to developer
• $10M to $50M: 25% to Steam, 75% to developer
• Above $50M: 20% to Steam, 80% to developer

For Slay the Spire, with an estimated gross revenue of $77,868,734, this results in an effective rate of 23.9%. Steam keeps approximately $18,573,747 and Mega Crit receives $59,294,988.

These estimates use the Boxleiter method, a widely-used industry approach that estimates game sales from the number of Steam reviews.

Factors that affect accuracy:

• Review-to-purchase ratio varies by genre
• Discount history - games with frequent deep sales may have higher ratios
• Regional pricing - different prices in different markets are not captured
• Refunds - Steam's return policy means some counted sales were refunded
• Bundled sales - keys sold through third-party bundles may not generate reviews

We provide a confidence range ($51,912,490 to $155,737,469) to reflect this uncertainty. For the best estimate we combine the Boxleiter range with a calibrated midpoint (x30) and a calibrated ASP of $14.

If Slay the Spire generated the same gross revenue on the Epic Games Store, Mega Crit would keep approximately $68,644,486 - that's $9,349,499 more than on Steam.

At this revenue level, Epic's concrete platform fee would be $9,224,248. Epic charges 0% on the first $1 million in annual per-app revenue and then 12% on the remaining amount. On GOG (30% cut), the developer would earn approximately $54,508,114.

Note: This is a hypothetical comparison. Actual sales volumes differ significantly between platforms, and Steam's larger user base typically drives substantially higher sales.

According to SteamSpy data, players spend an average of 79.4 hours in Slay the Spire, with a median playtime of 28.8 hours. The large gap between average and median suggests a dedicated core community playing well beyond the typical player.

Slay the Spire has a Metacritic score of 89/100, which is considered "generally favorable" by critics. The Steam community rates the game 98% positive based on 182,277 user reviews.