Mega Joker

Editor's notes

Mega Joker holds a unique position in the NetEnt catalogue: at 99%, it advertises one of the highest theoretical returns of any online slot ever released — but that number comes with conditions most reviews skip. The 99% figure applies only when playing at maximum bet and using the Supermeter mode strategically; at lower stakes the effective return drops well below the headline, which NetEnt itself does not quantify publicly. Understanding the two-tier structure is essential. The game runs on a double 3×3 grid with 5 fixed paylines: the bottom grid is the basic mode, and any win there can either be collected or transferred upward to fund the Supermeter — a second set of reels played at 20, 40, 100 or 200 coins per spin, where Mystery Wins of up to 2,000 coins become active and the Joker symbol pays at its highest rates. Credits can be collected back to basic mode at any point, making the Supermeter a rare case of genuine player agency: the closest thing classic slots have to a strategy layer. On top of this sits a progressive jackpot funded by 3% of all bets — pooled per casino brand rather than across a global network, so jackpot size and hit frequency vary significantly from one operator to another. Released by NetEnt in 2011 as an online adaptation of the classic Scandinavian fruit machine format (some sources date the HTML5 re-release to 2013), it remains a cult favourite among low-house-edge players more than a decade later. A close sibling, Jackpot 6000, offers the same Supermeter concept at 98.90% RTP. Worth reading alongside our Mega Moolah review: two progressive slots at opposite ends of the RTP spectrum — 88.12% there, 99% here — a reminder that "progressive jackpot" says nothing by itself about the underlying math.