Round 1: 97% Aviator vs 96.5% Spaceman - half a point that matters
Base RTP, house edge and multiplier reach. This is where long-run bankroll outcomes actually live.
Aviator ships a base RTP of 97% with a fixed 3% house edge that never moves regardless of cash-out target or Dual Bet configuration. Multiplier probabilities follow a clean 0.97/m curve: 1.5x hits on roughly 64.7% of rounds, 2x on 48.5%, 5x on 19.4%, 10x on 9.7%. About 3% of rounds resolve instantly at 1.00x - that is the house edge expressed inside the distribution rather than hidden in a black box.
Theoretical max multiplier is 10,000x, and SlotCatalog has one recorded round at 2,586,812x. The hard ceiling on the payout side is $10,000 per round, which becomes the binding cap at large stakes rather than the multiplier itself. Operators can deploy 94% or 96% variants, so verify the number in the info panel at your specific casino.
Spaceman runs a 96.5% RTP with a 3.5% house edge, half a percentage point below Aviator. The distribution shape is the same 0.965/m curve: 1.5x at 64.3%, 2x at 48.25%, 5x at 19.3%, 10x at 9.65%. Instant-crash rate sits around 3.5%.
The peak-hunting envelope is narrower: the multiplier is capped at 5,000x, which fires roughly once every 5,181 rounds. At $100 max stake and the 5,000x cap, the theoretical per-round top is $500,000 on the provider side, though operator payout caps usually kick in first. The half-point RTP gap translates to about $50 of extra expected loss per 10,000 rounds wagered at $1 flat stake - small on any single session, real on long-run volume.