Welcome to our deep dive on Alien Digger — the demo, the maths, and whether it earns a spot in your rotation. Onlyplay are the developer behind it, tuning the slot game for medium high volatility, with a return-to-player rate of 95.5%. Visually it's wrapped in a space theme, with the action running on 25 paylines across 5 reels. Top wins are capped at 10,487x your stake, a genuinely massive ceiling for the patient. The full verdict is below.
Written by James Holloway · Last updated: February 2026
Alien Digger is a slot from Onlyplay, wrapped in a space theme and powered by 25 paylines across 5 reels. The result is medium high volatility paired with a published RTP of 95.5%.
The mechanics are what make Alien Digger interesting. Look out for scatter symbols that unlock free spins and extra bonus rounds. Its medium high variance balances steady wins with the odd larger payout. All told, it's a serviceable entry in the Onlyplay catalogue.
At 95.5%, the RTP is slightly below the industry average of ~96%. While this is typical for many popular slots, players should be aware of the slightly lower theoretical return.
Medium-high volatility means wins come less frequently but tend to be larger when they hit. Players should be prepared for dry spells between bigger wins, requiring a moderate bankroll.
About 1 in 3 spins results in a win. This is a moderate hit frequency that balances win frequency with payout size.
Alien Digger features scatter symbols that can trigger free spins rounds. Landing the required number of scatter symbols anywhere on the reels activates the free spins feature, giving you extra chances to win without additional bets. During free spins, special modifiers may apply to boost your winning potential.
2.9 / 5 — Average
Alien Digger by Onlyplay provides a straightforward slot experience. While it may not break new ground, it offers medium high volatility gameplay that will appeal to certain player preferences.