Live Steam player count comparison, updated every 10 minutes. Both are Indie / RPG games.
Undertale is currently the more played game: 3,178 concurrent players on Steam right now vs 1,065 for Castle Crashers® — about 3× more players. Across all tracked metrics, Undertale leads 8 of 8.
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
Undertale has had the higher daily player count for the last 19 days — Castle Crashers® last led on Jun 26, 2026.
Days tracked
37
Current streak
19 days
Undertale
Lead changes
2
Closest gap
2%
Jun 27, 2026
How this works: each game's daily average concurrent players (from Coilr's 10-minute Steam polls), compared on the 37 days where both games have data — whichever averages higher leads that day. methodology
| Metric | Castle Crashers® | Undertale |
|---|---|---|
| Players right now | 1,065 | 3,178 |
| 24-hour peak | 1,451 | 3,456 |
| 7-day average | 1,409 | 2,808 |
| 30-day average | 1,789 | 2,404 |
| 30-day trend | — | +51% |
| Peak (tracked) | 2,953 | 3,957 |
| Steam reviews | 96% positive | 96% positive |
| Recent reviews (3 mo) | 95% positive | 96% positive |
| Total reviews | 139,426 | 330,258 |
| Owners (SteamSpy est.) | ~5,000,000 | ~5,000,000 |
| Release date | Sep 26, 2012 | Sep 14, 2015 |
| Price | $14.99 | $9.99 |
Full stats: Castle Crashers® · Undertale · add more games to this comparison →
| Month | Castle Crashers® | Undertale | ||
|---|---|---|---|---|
| Avg | Peak | Avg | Peak | |
| Apr 2026 | — | — | 1,028 | 1,458 |
| May 2026 | — | — | 951 | 1,373 |
| Jun 2026 | 1,485 | 2,953 | 1,945 | 3,530 |
| Jul 2026 (so far) | 1,690 | 2,698 | 2,788 | 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: 3,178 concurrent players on Steam vs 1,065 for Castle Crashers® — about 3× more players.
Over the last 30 days Castle Crashers® averaged 1,789 concurrent players and Undertale averaged 2,404. By that measure Undertale is currently the bigger game.
Yes. Across the 37 days Coilr has tracked both games, Castle Crashers® had the higher daily average on 8 days, most recently on Jun 26, 2026. Undertale has led for the last 19 days.
By Steam review score, Undertale rates higher: 96% positive across 330,258 reviews vs 96% across 139,426 for Castle Crashers®. Undertale has the larger player base right now (3,178 vs 1,065 concurrent). Player counts, ratings, price and trend are compared side by side above.
Undertale averaged 2,404 concurrent players over the last 30 days, up 51% vs the previous 30 days. Its highest tracked player count is 3,957.