What Is Mega Moolah?
Mega Moolah by Microgaming is the most famous progressive jackpot slot in the world, released in 2006 and holder of the Guinness World Record for the largest online progressive jackpot ever paid (€18.9 million in 2018). The base game is an African safari theme with standard free-spins mechanics, but the game is played primarily for its four-tier Jackpot Bonus.
The 88.12% base RTP is significantly below industry standard. This figure reflects the progressive jackpot contribution — a portion of every bet across the entire global Mega Moolah network funds the four jackpot tiers. Players who choose Mega Moolah are explicitly trading base-game value for participation in the progressive jackpot network.
RTP & Volatility
Mega Moolah carries a published RTP of 88.12%. Medium volatility means the game balances win frequency and payout size.
RTP is a theoretical long-run figure — it does not predict outcomes in any single session. Set a budget before playing.
Key Features
The Jackpot Bonus triggers randomly at the end of any spin, more likely at higher stakes but accessible at any bet level. A jackpot wheel is spun with 20 segments. The outer segments award Mini, Minor and Major jackpots; the innermost segment awards the Mega jackpot — the life-changing prize that has broken records multiple times.
The base game's free-spins feature awards 15 free spins when three or more Scatter symbols land, with all wins tripled (3x multiplier) during the bonus. Wild symbols are doubled (2x multiplier) and substitute for all non-scatter symbols. Combined with the standard 25-payline structure, the free-spins round is straightforward.
The four jackpot tiers — Mini, Minor, Major and Mega — are all guaranteed at their minimum values. The Mega jackpot has a minimum guaranteed level and grows with every bet across the entire Mega Moolah network. The specific current levels are displayed at the casino offering the game.
Theme & Design
An African wildlife safari: lions (wild), elephants, zebras, giraffes, buffalo, hyenas and safari jeeps across the 25-payline grid. The colour palette is golden savannah tones. The design is Microgaming's 2006-era style — characterful and clean, if dated by modern standards. The jackpot wheel overlay is visually distinct from the base game.
Verdict
Mega Moolah is played for the jackpot, not the base game. The 88.12% RTP is the lowest on this list by a significant margin — explicitly disclosed and structurally necessary to fund the global jackpot network. Irish players who choose Mega Moolah do so for the possibility of life-changing wins across the progressive jackpot tiers, understanding that base-game session value is the tradeoff.
Pros
- Guinness World Record for largest online jackpot payout
- Global Mega Moolah jackpot network
- Four progressive jackpot tiers (Mini, Minor, Major, Mega)
- 15 free spins with 3x multiplier for base game
- €0.25 minimum bet keeps jackpot accessible
Cons
- 88.12% RTP — lowest on this list by far
- Maximum bet of only €6.25
- Base game simple and dated
- Jackpot triggers are very rare
Where to Play Mega Moolah in Ireland
Mega Moolah is available at Irish casinos carrying Microgaming content. The current jackpot level is displayed at your casino.
Play at a Licensed Casino
Our recommended partner holds GRAI licence GRAI-0191-RB-26-0001.
Play Now — 18+Slots Gallery — Casino Alternative
Browse thousands of titles from Microgaming and other providers at Slots Gallery.
Slots Gallery — casino alternativeIs Mega Moolah Available on Mobile?
Microgaming builds all titles in HTML5. Mega Moolah runs in any modern mobile browser on iOS or Android. All features function identically on mobile.
Similar Games
- Immortal Romance — Microgaming high-RTP comparison
- Age of the Gods — Playtech progressive jackpot comparison
- Thunderstruck II — Microgaming high-quality comparison
- Book of Dead — High-volatility non-jackpot comparison
Frequently Asked Questions
Mega Moolah has a published base RTP of 88.12%. This is significantly below industry standard because a substantial portion of every bet contributes to the global progressive jackpot network.
The Jackpot Bonus triggers randomly at the end of any spin. A jackpot wheel is spun with 20 segments. Outer segments award Mini, Minor and Major jackpots; the innermost segment awards the Mega jackpot.
Mega Moolah holds a Guinness World Record for the largest online progressive jackpot payout: €18.9 million paid in October 2018. Multiple jackpots above €10 million have been recorded.
Yes. The game uses HTML5 and runs in any modern mobile browser on iOS or Android. The jackpot wheel mechanic works identically on mobile.
⚠ 18+ only. Gambling can be addictive. Play responsibly.
Contact the Gambling Awareness Trust: 1800 753 753 or gamblingcare.ie. RTP is a theoretical long-run average.