Undertale

In the Xbox version of Undertale, the dog shrine in Sans'/Papyrus' house contains a slot machine; Coine can be bought using the in-game currency, gambled in the slot machine to earn more Coine, and then donated to the shrine unlock aesthetic rewards.

The slot machine is skill-based; the player can stop the reels at any point. As such, a skilled player could win the maximum prize (DOG JACKPOT) every time for an RTP of 14900%. The below analysis assumes the player is stopping the reels entirely at random.

Winning combinations
Wins are calculated left-to-right. Only symbols across the centre are paid.

Overall hit rate: 1 in 2.70