Sketchbook Possession slot: RTP and max win
Sketchbook Possession is a low-volatility slot by ForgeHaven Studio on Stake Engine, released 2 Jun 2026. Its base game returns 96.09%, above the median Engine slot (96.02%) and higher than 52% of them. The top payout is 2,587× the bet. It has 2 bonus buys priced at 55× to 70× the bet; the best returns 95.92%, so each buy costs 2.85× the bet on average over the long run. It is the No. 5669 most played Engine slot over the last 30 days.
Every mode, side by side
Costs are multiples of the base bet. Odds come from the published outcome table for v11. "Returns the cost" counts rounds that pay back at least what the mode cost. Expected cost is cost × (1 − RTP): the average amount lost per round over the long run.
| Mode | Type | Cost | RTP | Max win | Max win odds | Pays anything | Returns the cost | Expected cost per round | |
|---|---|---|---|---|---|---|---|---|---|
| Base | Base spin | 1.00× | 96.09% | 1,767× | 1 in 19,999,999 | 1 in 4.16 | 1 in 53 | 0.04× base | |
| Ante | Boosted spin | 3.00× | 96.08% | 2,587× | 1 in 19,999,997 | 1 in 1.21 | 1 in 25 | 0.12× base | Simulate |
| No Small Wins | Boosted spin | 5.00× | 96.08% | 1,416× | 1 in 19,999,992 | 1 in 11 | 1 in 11 | 0.20× base | Simulate |
| Instant Bonus | Bonus buy | 55× | 95.88% | 1,893× | 1 in 19,999,661 | 1 in 1.01 | 1 in 7.52 | 2.26× base | Simulate |
| Extra Bonus | Bonus buy | 70× | 95.92% | 1,929× | 1 in 19,999,867 | every round | 1 in 7.03 | 2.85× base | Simulate |
Work out the cost of Sketchbook Possession bonus buys at your bet size
Version history
Base-mode RTP per published math version. Older versions stay public in the fairness API, so changes can be checked.
| Version | Base RTP | |
|---|---|---|
| v11 | 96.091% | Active |
Frequently asked
What is the RTP of Sketchbook Possession?
Base spins return 96.09% of the amount wagered over the long run, from the published outcome table for version 11. Its bonus buys return between 95.88% and 95.92%.
What is the max win in Sketchbook Possession and how likely is it?
The top payout is 2,587× the base bet. On a base spin the top payout of 1,767× lands 1 in 19,999,999 spins. In the Extra Bonus buy (70×) 1,929× lands 1 in 19,999,867 buys.
Does Sketchbook Possession have a bonus buy, and what does it cost?
Yes, 2 buy modes. Instant Bonus: 55× the base bet, 95.88% RTP, an expected cost of 2.26× the base bet per buy. Extra Bonus: 70× the base bet, 95.92% RTP, an expected cost of 2.85× the base bet per buy.
Is Sketchbook Possession high or low volatility?
Low. Its base-mode standard deviation is 8.4× the bet, which puts it in the lowest third of Engine games. What volatility means.
Can I check that a result was fair?
Yes. Engine games use provably fair seeds. Once your server seed is revealed you can replay any round against the published outcome table. See how to verify a result.
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