Take Doom’s Digging Machine and journey to the deepest crevices of the Earth’s crust in search of valuable gems that Doom needed for his evil schemes. It’s a video slot game from Octoplay with 95.70% return to player (RTP) and a max win of up to 5,000x your bet.

Doom’s Digging Machine is a video slot game with 5 reels and 6 rows. Winning combinations pay anywhere if you get 8 or more copies of the same symbol on the screen. The tumble feature triggers after a hit, removing the winning symbols and having new ones drop to fill the gap.
Octoplay opted for a cartoon-style approach to the titular character, Doom, like a villain from a Saturday morning television show. He has a rectangular head shape, disproportionately long arms and large hands. The symbols are stylised gems and fossils with magical animations for when they’re part of a winning combination.
Doom’s Digging Machine Details
| Software | Octoplay |
| Game Type | Video Slots |
| Paylines | Pay anywhere |
| Reels | 5 |
| RTP | 95.70% |
| Minimum Bet | US$0.10 |
| Maximum Bet | US$500.00 |
| Jackpot | 5,000x your bet |
Doom’s Digging Machine has an RTP of 95.70%. When using the Buy Feature to trigger the free spins bonus, the RTP is 95.87%. If Double Chance is enabled, the RTP is up to 95.81%.
Doom’s Digging Machine has a low/medium (2/5) volatility on all game modes.
The betting limit in Doom’s Digging Machine is US$0.10 on minimum and US$500.00 on maximum.
The max win in Doom’s Digging Machine is 5,000x your bet.

Playing Doom’s Digging Machine follows a traditional gameplay loop of clicking the spin button to place a bet. Every win keeps the tumble feature going, extending the round. All payouts are accumulated for a full spin and then paid at the end.
There is no payline in Doom’s Diggling Machine. Symbols can be placed anywhere on the grid and count as part of the winning combination if there are 8 or more of them simultaneously. Payouts are based on your bet multiplied by the symbol’s set value. The tumble feature removes the winning symbols, and new ones drop in the same column.
Low-paying Symbols

Low-paying symbols in Doom’s Digging Machine are gems with rocky frames. Each one has a distinct colour and shape to set them apart from each other. They look refined and processed, compared to high-paying symbols.
Here are the values of each gem from least to most valuable in Doom’s Digging Machine:
| Symbol | Set of 8 - 9 | Set of 10 - 11 | Set of 12+ |
| Purple Diamond | 0.20x your bet | 0.70x your bet | 2.00x your bet |
| Blue Triangle | 0.40x your bet | 0.90x your bet | 4.00x your bet |
| Green Heart | 0.50x your bet | 1.00x your bet | 5.00x your bet |
| Red Pentagon | 0.80x your bet | 1.20x your bet | 8.00x your bet |
| Yellow Square | 1.00x your bet | 1.50x your bet | 10.00x your bet |
High-paying Symbols

Whilst low-paying symbols look refined or processed, the high-paying symbols show natural, unpolished minerals. Rather than identifying them by shapes or colours, Doom’s Digging Machine presents them with different fossils for scale.
Here are the high-paying symbols and their values per set in Doom’s Digging Machine:
| Symbol | Set of 8 - 9 | Set of 10 - 11 | Set of 12+ |
| Hand Fossil | 1.50x your bet | 2.00x your bet | 12.00x your bet |
| Skull Fossil | 2.00x your bet | 5.00x your bet | 15.00x your bet |
| Mammoth Fossil | 2.50x your bet | 10.00x your bet | 25.00x your bet |
| Dinosaur Fossil | 10.00x your bet | 25.00x your bet | 50.00x your bet |
The scatter symbol in Doom’s Digging Machine is an image of the titular character laughing maniacally while pressing a big red button. Get at least 3 of them in a single spin, and you trigger the game's Free Spin bonus. The initial reward is 10 free spins, but each additional scatter symbol adds 5 more, up to a maximum of 30.
The Doom’s Digging Machine free spin bonus feature can also show the scatter symbol. Each one adds 1 more for a total of 10 max in a single spin. You also grow the global multiplier equal to the number of additional free spins won.
The Mystery Artefact only appears during the free spins mode. It’s usually taking up 2x2 or 3x3 positions in the grid with either 3x or 5x written on it. The number is added to your global multiplier, and if the Mystery Artefact breaks, it will reveal a cluster of any normal symbol.

The Doom’s Digging Machine bonus feature still uses the same grid, but the top screen now shows the global multiplier. It still features the same game mechanics as the base game, except every Scatter Mode that appears adds 1 free spin to the game mode.
The Tumble Feature is present in both the base game and free spin bonus modes. Every winning combination disappears from the grid, and new symbols fall to fill the vacant spots. The Global Multiplier is applied to each hit before being accumulated for the total payout.
Pressing the Buy Feature on the bottom right, next to the spin button, opens a window offering the opportunity to instantly trigger the Free Spin bonus. It will give you at least 3 guaranteed scatter symbols to guarantee 10 free spins. This will still trigger the Tumble Feature and give you a payout if there’s a winning set in the spin.
Octoplay is in partnership with Gmadom to offer you an exciting opportunity to win the casino jackpot. Click ‘opt-in’, increasing your bet by +US$0.20 per spin for a chance to win cash prizes or the progressive jackpot.
Octoplay’s slot games always have high-quality presentations with a simple hook and gameplay loop. The same is true for Doom’s Digging Machine, a low/medium volatility slot game that pays up to 5,000x your bet on max win. Play it here at Gamdom, where you can opt in to become one of the potential winners of the casino progressive jackpots.
If you liked Doom’s Digging Machine, then you should try these games from Octoplay:
Doom's Digging Machine by Octoplay has an RTP of 95.70%.
The volatility of Doom's Digging Machine by Octoplay is low/medium.
The maximum win of Doom's Digging Machine by Octoplay is set at 5,000x your bet.
The minimum bet is US$0.20, and the maximum bet is US$500.00.