Dr Undeds Boo Balls slot: RTP and max win
Dr Undeds Boo Balls is a low-volatility slot by Unded Games on Stake Engine, released 2 Feb 2026. Its base game returns 95.95%, below the median Engine slot (96.02%). The top payout is 10,010× the bet. It has 2 bonus buys priced at 50× to 100× the bet; the best returns 95.90%, so each buy costs 4.10× the bet on average over the long run. It is the No. 6641 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 v10. "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 | |
|---|---|---|---|---|---|---|---|---|---|
| High | Base spin | 1.00× | 95.95% | 75× | 1 in 14,124 | 1 in 3.35 | 1 in 4.94 | 0.04× base | Simulate |
| Low | Base spin | 1.00× | 96.00% | 75× | 1 in 14,124 | 1 in 1.67 | 1 in 7.18 | 0.04× base | Simulate |
| Buy10 | Boosted spin | 10× | 95.90% | 1,000× | 1 in 8,929 | – | 1 in 4.12 | 0.41× base | Simulate |
| Buy50 | Bonus buy | 50× | 95.90% | 5,000× | 1 in 8,929 | – | 1 in 4.12 | 2.05× base | Simulate |
| Buy100 | Bonus buy | 100× | 95.90% | 10,010× | 1 in 8,929 | – | 1 in 4.12 | 4.10× base | Simulate |
Work out the cost of Dr Undeds Boo Balls 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 | |
|---|---|---|
| v10 | 95.950% | Active |
Frequently asked
What is the RTP of Dr Undeds Boo Balls?
Base spins return 95.95% of the amount wagered over the long run, from the published outcome table for version 10. All 2 of its bonus buys return 95.90%.
What is the max win in Dr Undeds Boo Balls and how likely is it?
The top payout is 10,010× the base bet. On a base spin the top payout of 75× lands 1 in 14,124 spins. In the Buy100 buy (100×) 10,010× lands 1 in 8,929 buys.
Does Dr Undeds Boo Balls have a bonus buy, and what does it cost?
Yes, 2 buy modes. Buy50: 50× the base bet, 95.90% RTP, an expected cost of 2.05× the base bet per buy. Buy100: 100× the base bet, 95.90% RTP, an expected cost of 4.10× the base bet per buy.
Is Dr Undeds Boo Balls high or low volatility?
Low. Its base-mode standard deviation is 2.3× 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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