Survivor, which launched in September 2025, reverses the usual marble race. Five marbles go onto the track, and instead of backing the first across the line you back the last one standing.
How Survivor works
- Pick a marble: Neptune, Bee, Inferno, Green or White.
- Place your bet before the race locks.
- Watch the field thin out as marbles drop out of contention.
- Result. The last marble left wins.
There’s only the winner market, with no forecasts or tricasts.
Unequal marbles
Unlike the other races, Survivor’s marbles aren’t priced equally. Every marble returns 94.34%, so each multiplier tells you its true chance:
| Marble | Pays | Chance of surviving |
|---|---|---|
| Neptune | 2.52x | 37.4% |
| Bee | 3.77x | 25.0% |
| Inferno | 5.03x | 18.8% |
| Green | 7.55x | 12.5% |
| White | 15.09x | 6.25% |
The best value race
Survivor’s 94.34% base RTP applies to every selection, and Lightning Rounds lift it to between 95.39% and 96.47%. That’s the best return of any 155.io race, and its base figure beats even the crash game Footfall (94%). If you want 155.io’s real-world chaos at the lowest cost, start here.