This slot ships in 2 RTP versions
NetEnt distributes Starburst XXXtreme in multiple configurations. Operators choose which version to serve. Two players spinning the same game on different casinos may be playing at very different actual payback rates.
The difference between the top and bottom tier is approximately 0.19 percentage points of expected return. Always verify the configured RTP at the specific casino via the in-game paytable. Read how we verify multi-tier RTP →
Overview
- Theoretical RTP (max tier)
- 96.45%
- Theoretical RTP (min tier)
- 96.26%
- Volatility
- High
- Maximum win
- 200,000× bet
- Reels
- 5
- Paylines / ways
- 9 (fixed)
- Release year
- 2021
- Provider
- NetEnt
Editor's notes
Sequel to Starburst (2012), the most-played slot in online casino history, released 10 years and 9 days after the original. Same DNA — 5×3 grid, 9 paylines, cosmic gem theme, expanding wild respins — but a 400× improvement in ceiling: the original capped at 500x, XXXtreme reaches 200,000x, one of the highest fixed max wins in the industry. Wilds land only on the middle three reels, expand to cover the full reel, lock in place and trigger respins. Each wild can carry a random multiplier up to 150x; with all three middle reels wild, the combined multiplier reaches 450x — that is where the 200,000x ceiling lives. The probability of a max win is roughly 1 in 342 million spins. Wins pay both ways, left-to-right and right-to-left, a trait inherited from the original. XXXtreme Spins (bonus buy, not available in the UK) guarantees 1-2 Starburst Wilds per spin and raises the RTP from 96.26% to 96.45% — one of the cases where a buy feature improves the math rather than worsening it. Hit frequency is around 22.5%. Bet range €0.10–€200. Notably, some operators choose not to stock XXXtreme because of the 200,000x liability exposure. The original Starburst remains live alongside the sequel in most lobbies — the original serves the casual, lower-volatility audience at 96.09% RTP, while XXXtreme targets high-volatility players.
Sources
Every value on this page is sourced from primary documentation. Where the source URL has been preserved on the Internet Archive, the archived snapshot link is provided alongside the live URL so the data behind any claim can be inspected even if the live URL changes.
- Provider game page Not publicly available. NetEnt does not maintain public game data pages — values verified via in-game paytable at the casino level (see per-casino observations below).
How was this verified? Every value on this page comes from a primary source documented in our RTP verification methodology. Spotted an error? Email the editors — acknowledged within 5 business days.