Mr. Oinkster is back, and this time he’s got a golden key instead of a top hat full of tricks. Booming Games is bringing back their fan-favorite pig tycoon on September 24, 2026, and this one’s built around wild reels, coin collects, and a couple of clever free spins modes.
Play Mr. Oinkster’s Key to Riches Demo
Want to see Mr. Oinkster’s Key to Riches in action before it launches? You can try the free demo right here on this page, no download and no real money needed. Spin the reels, chase the wild coin collects, and get a feel for both free spins modes before the official release.
Basics
This is a 5×3 slot with 40 fixed paylines, so you can’t fiddle with the number of lines. You bet between €0.20 and €60.00 per spin, and the max win sits at 4000x your bet, capped at €240,000.
The RTP is 95.6%, which is decent but not amazing. Volatility is rated “Very High,” so brace yourself for a bumpy ride. Regular wins show up about once every 3 spins, but the free spins round is rare, landing roughly once every 189 spins. That tells you this game is built for patience and big swings, not steady drip-feed wins.
How Wild Reels Work
Certain positions on the grid are marked as Wild Reels. These spots can only land a regular symbol or Mr. Oinkster’s wild. Coins can never show up there, which is important once you understand the coin collect feature.
Mr. Oinkster’s wild substitutes for everything except the coin symbol, so it’s doing double duty as both a paying wild and a collector.
Wild Coin Collect
If a wild lands on one of those special Wild Reel positions, and there’s at least one coin symbol anywhere on the grid, that wild scoops up every single coin present and hands you the value.
Coins aren’t just plain cash either. Some carry multipliers of 0.5x, 1x, 1.5x, or 2x your base bet. Others hide Prize Pots: Mini pays 5x, Minor pays 10x, Major pays 50x, and Grand pays a hefty 1,000x your bet. Land a wild at the right time with a Grand coin on screen, and you’re in for a serious payday.
Wild Nudge Modifier
If a wild lands but there are no coins anywhere on the grid, the game might trigger a nudge instead. It picks between 1 and 5 other positions on the grid and nudges in either a coin or a symbol that helps complete a win. Basically, the game gives you a second chance to turn a near-miss into an actual win.
Free Spins, Two Different Ways
Free spins kick off when you trigger one or both of the Piggy Banks sitting above the reels. Each piggy bank unlocks its own version of the bonus.
Multiplier Free Spins gets you 6 spins. Whenever the wild lands with a coin on the grid, whatever you collect gets multiplied by 2x, 3x, or 5x. Special coins with a “+1 Spin” value can also show up here, adding extra spins on top.
Double Free Spins also gives you 6 spins, but with a twist. Two wild positions are active at the same time, one on reel 2 and one on reel 4. Both act as collectors, so any wild landing in either spot grabs all the visible coins. Same deal with +1 spin coins extending your round.
Combined Free Spins is the jackpot scenario. If you trigger both piggy banks at once, you get 12 free spins with both wild features running together. Two wild positions are active, multipliers still apply, and if both wilds land at the same time, every coin gets collected by each wild and multiplied separately. This is clearly the mode you’re hoping for if you land the bonus at all.
Buy Feature and Boost+
Don’t want to wait around for the bonus to show up naturally? You can buy it. The Mystery Bonus costs 100x your bet, and the Super Bonus costs 200x your bet. Either way, buying it guarantees a trigger, so you know exactly what you’re paying for.
There’s also a Boost+ option you can toggle on and off during the base game. Turning it on bumps your bet by 1.5x but improves your odds of triggering the bonus features. It’s a nice middle ground if buying the full bonus feels too steep but you still want better odds.
Keep in mind, wins are calculated off your base bet, not whatever inflated amount Boost+ adds.
Win Cap
The max win on this game is 4000x your bet. If your total win during a feature hits or crosses that number, the feature stops right there and you get paid exactly 4000x. So even on a dream run, there’s a ceiling.
Our Take
Mr. Oinkster’s Key to Riches leans hard into high volatility, low-frequency bonus territory. You’re not going to trigger free spins often, but when you do, the combined mode with dual wild collectors and stacked multipliers has real teeth. The wild nudge modifier is a smart touch that softens the base game a bit between bonus droughts. If you enjoyed the earlier Mr. Oinkster games, this feels like a natural next step with more moving parts and bigger swings.
If you like grinding through spins for the occasional huge hit rather than steady small wins, this one’s worth a look. If you prefer smoother, more frequent payouts, the very high volatility here might wear you down.
