Quick verdict: Fortunium is a slot from Stormcraft Studios for Microgaming (now Games Global), released in June 2018, with 5 reels, 5 rows and 40 fixed paylines. Its features are stacked Mystery Symbols that all turn into the same symbol, an optional Win Booster and free spins with whole reels of Mystery Symbols. RTP is 96.37% (96.47% with the Win Booster), volatility is medium and the max win is 800x.
Demo tested on mobile by Jason Thompson on 15 October 2026: it loaded and worked.
Where we’d play Fortunium
Our top-rated casino is 1win (9.9/10): it paid our June 2026 crypto withdrawal in 15 minutes.
Play at 1win18+. T&Cs apply. Not available in every country. Game libraries vary, so search the lobby for Fortunium.
How do Fortunium’s Mystery Symbols work?
Mystery Symbols are stacked blocks marked with a question mark. After the reels stop, every Mystery Symbol on screen turns into the same randomly chosen symbol: a card suit, a premium or a Wild, but never the Scatter. Because they land in tall stacks on a 5×5 grid, a good reveal can fill most of the screen with one symbol across all 40 lines. The top characters, Victoria and Maximillian, also land stacked on their own.
Is the Win Booster worth it?
The Win Booster adds 50% to your bet. In return, Mystery Symbols can only reveal premium symbols or Wilds, never the low card suits, and the boosted state carries into the free spins. SlotCatalog lists the RTP as 96.37% normally and 96.47% boosted, so the extra cost is returned slightly better on average. It suits players who want fewer small reveals and are comfortable spending 1.5x per spin.
Fortunium at a glance
| Studio | Stormcraft Studios (its first game) for Microgaming, now Games Global |
|---|---|
| Released | June 2018 |
| Layout | 5 reels, 5 rows, 40 fixed paylines |
| RTP | 96.37%, or 96.47% with the Win Booster |
| Volatility | Medium |
| Bet per spin | 0.10 to 125 (up to 187.50 with the Win Booster) |
| Max win | 800x your stake |
| Free spins | 10, with 1, 2 or 3 Mystery Reels |
| Gamble feature | No |
| Mobile | Yes |
Fortunium free spins and Mystery Reels
Three or more Scatters award 10 free spins. How many Scatters you land decides how many Mystery Reels you get: 3 Scatters give 1 reel, 4 give 2 and 5 give 3. A Mystery Reel is filled with Mystery Symbols on every free spin, so each spin reveals at least one full reel of a matching symbol. Each extra Scatter during the round adds spins.
Fortunium paytable
| Symbol | 5 of a kind (x stake) |
|---|---|
| Scatter | 100x |
| Wild | 20x |
| Victoria, Maximillian | 8x each |
| Chest | 6x |
| Airship | 5x |
| Gun | 4x |
| Card suits | 1.2x to 2x |
Line pays look small because there are 40 lines: the money comes from a Mystery reveal that lands one premium across many lines at once.
Fortunium vs Fortunium Gold Mega Moolah
The September 2020 sequel, Fortunium Gold: Mega Moolah, adds a golden Mystery Symbol that can create Jackpot Wilds and a Jackpot Wheel with the four Mega Moolah progressives. Its base RTP is 92.67% because part of every bet funds the jackpots, so the original Fortunium returns more on ordinary spins. Read how those jackpots work in our Mega Moolah review.
Tips for Fortunium
- Decide on the Win Booster before you start and keep it on or off for the session; switching only after a cold run changes your cost per spin without changing the odds.
- Five Scatters matter twice: they pay 100x and give the full three Mystery Reels in free spins.
- With an 800x cap and medium volatility, Fortunium suits longer sessions more than jackpot hunting.
Where to play Fortunium
Fortunium is supplied by Games Global, so casinos with Microgaming or Games Global slots usually carry it; check the info screen shows 96.37%. New to 1win? Use promo code Ultragambler and check the welcome terms on our 1win promo code page. For more games by RTP, try the Slot RTP Checker or browse our types of slots.
Fortunium FAQs
What is the max win on Fortunium?
800x your stake, according to Bigwinboard, KingdomGames and MintySlots (one other review says 2,000x).
What is Fortunium’s RTP?
96.37% as standard and 96.47% with the Win Booster, per SlotCatalog and Bigwinboard.
Does Fortunium have a gamble feature?
No. Wins are paid straight away, with no double-or-nothing option.
Can I play Fortunium for free?
Yes, the demo on this page runs on free credits; it loaded on a phone when we tested it on 15 October 2026.
How we checked this
- Stormcraft Studios for Microgaming, June 2018, Mystery Symbols, Win Booster and Mystery Reels: CasinoBeats and InterGame.
- 5×5 with 40 lines, 96.37% and 96.47% RTP, medium volatility, bets, 800x max win, 10 free spins and paytable: SlotCatalog, Bigwinboard and KingdomGames.
- Fortunium Gold: Mega Moolah (September 2020, 92.67% base RTP): Gambling.com and Casinos.com.
- Figures last checked: 15 October 2026.
Important: check your local laws before you play
Online gambling laws differ from country to country, and in some places it is restricted or not permitted at all. Check that online gambling is legal where you live and that the casino accepts players from your country. You must be 18 or older (or the legal gambling age in your country, if higher). Only gamble with money you can afford to lose.
