Starburst Has Six Different Versions and Your Casino Picked One Without Telling You

Starburst is the most-played NetEnt slot in UK casino history. It is also available in six different RTP configurations, and your casino chose one without telling you which.

The six versions: 96.09%, 95.05%, 94.05%, 93.05%, 92.05%, and 90.05%. All six look identical. Same expanding wilds. Same re-spin feature. Same gem symbols. Same sound effects. The only difference is invisible — the underlying mathematical model that determines how much of your wagers are returned over time.

At 96.09%, Starburst's house edge is 3.91%. At 90.05%, it is 9.95% — more than 2.5 times higher. A player who wagers £5,000 on Starburst at 96.09% expects to lose £195.50. The same player at 90.05% expects to lose £497.50. Three hundred pounds of additional expected loss on the same number of spins on the same game at a different casino.

Our tracking data shows most UK casinos in 2026 deploying Starburst at 94.05% — the third tier. This is already a meaningful reduction from the 96.09% theoretical. Some UK operators may be running lower tiers. LeoVegas has been verified at 94.05% through FindMyRTP data.

The two UK operators verified as maintaining Starburst at the 96.09% theoretical maximum are Bet365 Casino and PlayOJO. If Starburst is part of your regular slot rotation, these two operators offer approximately £100 less expected loss per £5,000 wagered compared to the typical UK 94.05% deployment.

To check which version your casino runs: open Starburst, click the information or rules icon, and find the RTP figure. Compare it against the 96.09% theoretical maximum. If your casino shows anything below 96.09%, you are playing a reduced version.