Live Steam player count comparison, updated every 10 minutes. Both are Action games.
Killing Floor 2 is currently the more played game: 4,119 concurrent players on Steam right now vs 1,756 for ULTRAKILL — about 2.3× more players. ULTRAKILL counters with better Steam reviews: 97% positive vs 88%. Across all tracked metrics, Killing Floor 2 leads 5 of 9.
Coilr tracks charts like this for every game — and playtime history for your own library.
Tracked by Coilr since June 2026 · Steam polled every 10 minutes · methodology
| Metric | Killing Floor 2 | ULTRAKILL |
|---|---|---|
| Players right now | 4,119 | 1,756 |
| 24-hour peak | 4,529 | 4,090 |
| 7-day average | 3,513 | 2,851 |
| 30-day average | 3,513 | 2,858 |
| 30-day trend | — | — |
| Peak (tracked) | 4,685 | 4,090 |
| Steam reviews | 88% positive | 97% positive |
| Recent reviews (3 mo) | 84% positive | 97% positive |
| Total reviews | 129,108 | 237,278 |
| Owners (SteamSpy est.) | ~2,000,000 | ~5,000,000 |
| Release date | Nov 18, 2016 | Sep 3, 2020 |
| Price | $29.99 | $29.99 |
Full stats: Killing Floor 2 · ULTRAKILL · add more games to this comparison →
| Month | Killing Floor 2 | ULTRAKILL | ||
|---|---|---|---|---|
| Avg | Peak | Avg | Peak | |
| Jun 2026 | — | — | 3,660 | 3,768 |
| Jul 2026 (so far) | 3,543 | 4,685 | 2,900 | 4,090 |
Monthly average and peak concurrent players on Steam, from Coilr's own tracking (10-minute polls, hourly beyond 30 days).
Killing Floor 2 currently has more players: 4,119 concurrent players on Steam vs 1,756 for ULTRAKILL — about 2.3× more players.
Over the last 30 days Killing Floor 2 averaged 3,513 concurrent players and ULTRAKILL averaged 2,858. By that measure Killing Floor 2 is currently the bigger game.
By Steam review score, ULTRAKILL rates higher: 97% positive across 237,278 reviews vs 88% across 129,108 for Killing Floor 2. Killing Floor 2 has the larger player base right now (4,119 vs 1,756 concurrent). Player counts, ratings, price and trend are compared side by side above.