3 Reactors of Doom is a Qora video slot set in a ruined city under snow, with toxic sludge running past the reels. The base game runs 5 reels and 4 rows over 50 paylines, and the Expansion features open it to 6 rows and 100 paylines. All wins are paid from left to right off the leftmost reel. The return to player is 94%, the volatility is high, and the maximum win is 6,000 times the bet. Stakes run from $0.20 to $200.
The backpack heads the paytable, followed by the first aid kit and the Geiger counter at the same level, then the canned food and the flashlight, with the scratched metal royals at the base, A, K and Q above J, 10 and 9. The Wild is the gas-masked figure in the hazard-striped frame, and it substitutes for all paying symbols other than the three Biohazard Coins.
Reactor pipes above the reels collect the coins, and each one that lands can set its feature running. The Expansion Feature awards 5 free spins on the larger grid, where a Wild fills its reel and a few carry x2 or x3. The Multiplier Feature awards 5 free spins with a count that begins at x1 and rises by 1 each spin. The Jackpot Feature awards 10 free spins, and its coins reveal letters for MINI, MINOR, MAJOR and GRAND.
Seven free spin variations exist, because coins of more than one colour can trigger together. Two features produce a Super Feature that carries both mechanics, and three produce the Mega Feature across 10 free spins. Jackpot Multiplier Coins raise the value of a single jackpot while the round is live. A Bonus Buy is available at all three levels.
| Game provider | Qora-Gaming |
| Game platform |  UNIFIED |
Step into the ruins with 3 Reactors of Doom from Qora, where snow covers broken buildings and green sludge runs past the reels. You play 5 reels and 4 rows over 50 paylines, and the grid grows to 6 rows and 100 paylines in an Expansion feature. Wins pay left to right from the leftmost reel. The RTP is 94%, the volatility is high, and your top win is 6,000 times your bet. Your stake runs from $0.20 to $200.
The backpack is your top payer, then the first aid kit and the Geiger counter level with each other, then the canned food and the flashlight, with the corroded royals underneath, A, K and Q ahead of J, 10 and 9. Your Wild is the hooded figure in the gas mask, and it covers every paying symbol. The Biohazard Coins stay out of its way.
The three pipes over the reels are what you are filling. Green coins feed Expansion, purple feed Multiplier, red feed Jackpot, and each one you land has a shot at opening its feature. Expansion gives you 5 free spins on the wider grid, and each Wild fills its reel, some at x2 or x3. Multiplier gives you 5 free spins and a count that climbs by 1 a spin. Jackpot gives you 10 free spins and coins that carry jackpot letters.
There are seven ways the round can play out. Collect two colours and a Super Feature runs both mechanics for you. Collect all three and the Mega Feature hands you 10 free spins with full reels of Wilds, a climbing multiplier and letters for the ladder, which runs MINI, MINOR, MAJOR and GRAND. The Bonus Buy takes you in at any of the three levels. Light the reactors and see what the wasteland pays.
