Live Steam player count comparison, updated every 10 minutes. Both are RPG games.
Undertale is currently the more played game: 2,961 concurrent players on Steam right now vs 1,285 for Crusader Kings II — about 2.3× more players. Undertale also has the better Steam reviews: 96% positive vs 91%. Crusader Kings II is free to play, while Undertale costs $9.99. Across all tracked metrics, Undertale leads 9 of 9.
Coilr tracks charts like this for every game — and playtime history for your own library.
Tracked by Coilr since April 2026 · Steam polled every 10 minutes · methodology
| Metric | Crusader Kings II | Undertale |
|---|---|---|
| Players right now | 1,285 | 2,961 |
| 24-hour peak | 2,019 | 3,722 |
| 7-day average | 1,499 | 2,714 |
| 30-day average | 1,499 | 2,551 |
| 30-day trend | — | +51% |
| Peak (tracked) | 2,029 | 3,957 |
| Steam reviews | 91% positive | 96% positive |
| Recent reviews (3 mo) | 84% positive | 96% positive |
| Total reviews | 73,755 | 330,258 |
| Owners (SteamSpy est.) | ~2,000,000 | ~5,000,000 |
| Release date | Feb 14, 2012 | Sep 14, 2015 |
| Price | Free to play | $9.99 |
Full stats: Crusader Kings II · Undertale · add more games to this comparison →
| Month | Crusader Kings II | Undertale | ||
|---|---|---|---|---|
| Avg | Peak | Avg | Peak | |
| Apr 2026 | 1,100 | 1,284 | 1,028 | 1,458 |
| May 2026 | — | — | 951 | 1,373 |
| Jun 2026 | — | — | 1,947 | 3,530 |
| Jul 2026 (so far) | 1,504 | 2,029 | 2,789 | 3,957 |
Monthly average and peak concurrent players on Steam, from Coilr's own tracking (10-minute polls, hourly beyond 30 days).
Undertale currently has more players: 2,961 concurrent players on Steam vs 1,285 for Crusader Kings II — about 2.3× more players.
Over the last 30 days Crusader Kings II averaged 1,499 concurrent players and Undertale averaged 2,551. By that measure Undertale is currently the bigger game.
By Steam review score, Undertale rates higher: 96% positive across 330,258 reviews vs 91% across 73,755 for Crusader Kings II. Undertale has the larger player base right now (2,961 vs 1,285 concurrent). Player counts, ratings, price and trend are compared side by side above.
Undertale averaged 2,551 concurrent players over the last 30 days, up 51% vs the previous 30 days. Its highest tracked player count is 3,957.