Live Steam player count comparison, updated every 10 minutes. Both are RPG games.
Undertale is currently the more played game: 3,201 concurrent players on Steam right now vs 1,784 for Fallout Shelter — about 1.8× more players. Undertale also has the better Steam reviews: 96% positive vs 88%. Fallout Shelter 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 | Fallout Shelter | Undertale |
|---|---|---|
| Players right now | 1,784 | 3,201 |
| 24-hour peak | 2,424 | 3,722 |
| 7-day average | 1,795 | 2,713 |
| 30-day average | 1,795 | 2,544 |
| 30-day trend | — | +51% |
| Peak (tracked) | 2,424 | 3,957 |
| Steam reviews | 88% positive | 96% positive |
| Recent reviews (3 mo) | 83% positive | 96% positive |
| Total reviews | 81,835 | 330,258 |
| Owners (SteamSpy est.) | ~2,000,000 | ~5,000,000 |
| Release date | Mar 29, 2017 | Sep 14, 2015 |
| Price | Free to play | $9.99 |
Full stats: Fallout Shelter · Undertale · add more games to this comparison →
| Month | Fallout Shelter | Undertale | ||
|---|---|---|---|---|
| Avg | Peak | Avg | Peak | |
| Apr 2026 | — | — | 1,028 | 1,458 |
| May 2026 | — | — | 951 | 1,373 |
| Jun 2026 | — | — | 1,947 | 3,530 |
| Jul 2026 (so far) | 1,782 | 2,424 | 2,786 | 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: 3,201 concurrent players on Steam vs 1,784 for Fallout Shelter — about 1.8× more players.
Over the last 30 days Fallout Shelter averaged 1,795 concurrent players and Undertale averaged 2,544. By that measure Undertale is currently the bigger game.
By Steam review score, Undertale rates higher: 96% positive across 330,258 reviews vs 88% across 81,835 for Fallout Shelter. Undertale has the larger player base right now (3,201 vs 1,784 concurrent). Player counts, ratings, price and trend are compared side by side above.
Undertale averaged 2,544 concurrent players over the last 30 days, up 51% vs the previous 30 days. Its highest tracked player count is 3,957.