Theoretical RTP
95.20%
Volatility
MediumMax Win
1,024x
Release Date
2017
NetEnt offers 6 RTP configurations for this slot. Most UK casinos in 2026 deploy at 94.05%. Check the in-game info screen at your casino to confirm which tier you are playing.
Verified deployment data coming soon. Check available titles:
Live RTP by Casino
See how this slot's RTP varies across different casinos
| Casino | RTP Setting | Difference | Status |
|---|---|---|---|
| Zizobet | 96.80% | 0.00% | Theoretical max |
| Cosmobet | 96.80% | 0.00% | Theoretical max |
| Mad Casino | 90.05% | -6.75% | Lowest ⚠️ |
| Gambiva | 96.80% | 0.00% | Theoretical max |
| bet365 | 96.80% | 0.00% | Theoretical max |
| Betway | 96.80% | 0.00% | Theoretical max |
| Ladbrokes | 94.00% | -2.80% | Below average |
| LeoVegas | 95.00% | -1.80% | Reduced |
| Mr Green | 95.00% | -1.80% | Reduced |
| Sky Casino | 92.00% | -4.80% | Low ⚠️ |
| Snatch Casino | 96.80% | 0.00% | Theoretical max |
| William Hill | 94.00% | -2.80% | Below average |
RTP Tracking Coming Soon
RTP Tracking Coming Soon
Live deployed RTP tracking launches in Q2 2026. Subscribe to alerts to be notified when tracking goes live for this slot.
About Butterfly Staxx
Butterfly Staxx is Patient Zero for NetEnt's operator-configurable RTP. In December 2019, NetEnt selected this game and Reel Rush as the first two titles to pilot variable tiers. The tier menu — 99%, 98%, 96%, 95%, 94%, 93%, 92%, 90% — became the template for every NetEnt variable deployment that followed. Every tier check you do at every casino, you do because of this slot.
The default theoretical is 96.80%. At non-UK casinos it can legitimately run at 90.05%. UK casinos generally deploy 96.80%, but the configuration is technically certified across the entire 8-tier range. Verification through the in-game information screen is essential rather than optional.
Mechanically, Butterfly Staxx is a 5-reel, 40-payline NetEnt classic with the signature Butterfly Spins respin feature: when a stacked Butterfly wild lands, butterflies fly to the leftmost positions and trigger a respin with sticky wilds. Five Butterfly scatters trigger 7 free spins where the respin mechanic chains aggressively. Low volatility and a 640x max win cap make it a common wagering-clearing choice — frequently permitted in UK bonus wagering unlike many higher-volatility NetEnt titles.
For guaranteed safety against tier risk: Neon Staxx (96.86%) is not in the adjustable-RTP cohort — strictly safer against operator downgrade. Players who want the Staxx-family feature without the variable-tier exposure should choose Neon Staxx. Players who want Butterfly Staxx specifically should verify the deployed tier before extended play.
The historical significance is the editorial angle here. Butterfly Staxx is not the best NetEnt slot, not the highest RTP, not the biggest max win. It is the slot that taught every NetEnt operator how to dial RTP down. The entire industry's variable-tier infrastructure traces back to this title's December 2019 pilot.
Key Features
Butterfly Spins Respin
Stacked Butterfly wilds trigger respins with the wilds sliding to leftmost positions and remaining sticky.
8-Tier Variable RTP
Configurable across 99%, 98%, 96%, 95%, 94%, 93%, 92%, 90% — the template NetEnt rolled out to every variable title.
Free Spins
5 Butterfly scatters award 7 free spins where the respin mechanic chains aggressively.
Low Volatility
640x max win cap and frequent small wins make it a common bonus-wagering choice.
40 Paylines
Standard 5-reel, 40-payline structure with stacked Butterfly wilds across all reels.
Pilot Title
One of two NetEnt titles (with Reel Rush) used to pilot the variable-RTP rollout in December 2019.
Track RTP changes on Butterfly Staxx:
Deployed RTP changes, new slot launches, and the data UK casinos don't advertise. One email per week. Unsubscribe anytime.
RTP does not guarantee wins. Return to Player percentages reflect long-term mathematical averages across millions of spins. Individual sessions can and will produce results that differ significantly from theoretical RTP. Slot outcomes are determined by certified random number generators. Play responsibly.