Safe Smash

A multi-step crash-style game where players hit a safe with a hammer, accumulating multipliers with each hit — but risk the hammer breaking at any time.

Property	Value
Game ID	safe-smash
Type	multi_step
Volatility	High
Max Win	50× bet
Engine version	1.0.0
RTP variants	91.37% / 93.48% / 95.39% / 96.49%

Game Mechanic

1. Player places a bet
2. Server determines the safe's crack threshold (12–16 hits) and the multiplier pool
3. Each hit awards a random multiplier from the pool
4. The hammer may break on any hit — ending the round with 0× payout
5. Player can cash out after any successful hit to keep accumulated winnings
6. If the safe cracks (all hits completed), a jackpot chance triggers

Safe Crack Threshold

The number of hits required to crack the safe is determined at round start:

• Minimum: 12 hits
• Maximum: 16 hits
• Determined by the provably fair RNG

The player does not know how many hits are needed until the safe cracks.

Multiplier Pool (RTP_96)

Each hit draws from this weighted multiplier pool (weights total 100, so weight and probability are the same number):

Multiplier	Weight	Probability
0.0×	34	34.0%
0.5×	11	11.0%
1.0×	17	17.0%
1.2×	15	15.0%
1.5×	10	10.0%
2.0×	8	8.0%
3.0×	3	3.0%
5.0×	2	2.0%

RTP is tuned by moving weight between these tiers; the tier VALUES are the same in every variant.

Hammer Break Probability

6% per hit, in every RTP variant. The break risk is not a tuning lever — RTP moves through the multiplier weights instead (see the pool table above), which keeps the risk the player is taking the same whatever variant a tenant runs.

RTP Variant	Break probability per hit	Multiplier pool (0× weight)
RTP_92	6%	34
RTP_94	6%	37
RTP_96	6%	34
RTP_97	6%	31

INFO

The break is a per-hit draw: each hit consumes one range [1,100] value and breaks on a 6-or-under. It is provably fair because the draw sequence is deterministic given the committed seed — the verifier replays the same hits in the same order and gets the same breaks.

Only the crack threshold (12–16 hits) is fixed at round start.

Jackpot

When the safe cracks (player completes all hits without the hammer breaking):

• 30% chance of triggering the jackpot bonus
• Jackpot multipliers: 5×, 10×, 15×, 20×, 25×, drawn with equal weight
• Jackpot multiplier is added to the accumulated total

Jackpot	Weight	Probability
5×	1	20%
10×	1	20%
15×	1	20%
20×	1	20%
25×	1	20%

The 50× max win is the engine cap on the credited win, and the accumulated pot plus a jackpot does reach it.

Cash Out

• Available after the first successful hit
• Cashes out the accumulated multiplier × bet amount
• Not available during the jackpot bonus
• Triggers round.completed webhook with endReason: 'cash_out'

End Reasons

Reason	Description
busted	Hammer broke — player loses bet
jackpot	Safe cracked + jackpot triggered
game_over	Safe cracked, no jackpot
cash_out	Player cashed out voluntarily

Example Round

Hit 1: 0.5× (accumulated: 0.5×)  → Continue or cash out?
Hit 2: 1.0× (accumulated: 1.5×)  → Continue or cash out?
Hit 3: 0.2× (accumulated: 1.7×)  → Continue or cash out?
Hit 4: 2.0× (accumulated: 3.7×)  → Cash out! → Payout: 3.7× bet