Rail Sim Universe ALPHA vs Build a Slime Defense
Rail Sim Universe ALPHA currently leads with 203 concurrent players against 66, a 3.1× advantage. On all-time peak the record belongs to Build a Slime Defense at 215 concurrent players, versus 211. Lifetime, Build a Slime Defense has more visits (5.4M vs 5.1M). Full side-by-side history for Rail Sim Universe ALPHA and Build a Slime Defense is charted above.
Rail Sim Universe ALPHA
203
playing now
211 24h peak · 5.1M visits
VS
Build a Slime Defense ⚔️
66
playing now
114 24h peak · 5.4M visits
Player count history
Rail Sim Universe ALPHABuild a Slime Defense
Head to head
| Metric | Rail Sim Universe ALPHA | Build a Slime Defense | Difference |
|---|---|---|---|
| Playing now | 203 | 66 | 137 (3.1×) |
| 24h peak | 211 | 114 | 97 (1.9×) |
| 24h average | 154 | 79 | 75 (1.9×) |
| 7-day peak | 211 | 215 | 4 |
| 7-day average | 124 | 89 | 35 |
| 30-day peak | 211 | 215 | 4 |
| All-time peak | 211 | 215 | 4 |
| 24h change | ▲ 49.5% | ▲ 11.3% | — |
| 7d change | — | ▼ 20.5% | — |
| Total visits | 5.1M | 5.4M | 273.5K |
| Visits (24h) | 16.1K | 7.9K | 8.2K (2.0×) |
| Visits (7d) | 37.9K | 68.8K | 31K (1.8×) |
| Favorites | 51.8K | 27.3K | 24.5K (1.9×) |
| Rating | 92.0% | 98.8% | — |
| Global rank (players) | #3,275 | #4,245 | of 7,786 |
| Trending score | 44.6 | -17.1 | — |
| Created | Sep 20, 2022 | May 16, 2026 | — |
| Genre | Simulation | Strategy | — |
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Both games are sampled on the same schedule and plotted on a shared time axis, so the comparison is like for like. Peaks, averages and growth come from RoVitals's own recorded history — 4 days for Rail Sim Universe ALPHA, 10 for Build a Slime Defense.