Mine Defender is a space themed slot from ELK Studios, where your task is to destroy sparkling crystals and enemy robots. A cartoon hero blasts away at the 5x6 symbol grid, collecting prizes of up to 10,000x your bet.
Winning symbols get destroyed and trigger cascades of those remaining. Cascades repeat until there’s no further win, although robots can then appear from the top, attacking the hero if they reach the bottom row. Life symbols can keep him going, while bombs, airstrikes, and multipliers add extra lives to his tally. Destroy enough robots to take on a Final Boss for the greatest rewards. A Mass Attack bonus game makes it easier to build multipliers and reach the Final Boss.
It's a highly volatile game with average returns of 94.00% that you can enjoy across desktop and mobile devices at the best online slots sites. If you enjoy classic Space Invaders styled games, be sure to join the hero as he fights for glory in this far-flung corner of the galaxy.
Set deep within a crystal mine, 5 columns and 6 rows of symbols appear above the cartoon miner and his laser-blasting ship. The brightly coloured crystal symbols contrast nicely with the deep blue backdrop and come in orange, green, blue, and other sparkling shades. Red hearts, animated robots in a range of sizes, plus a variety of bonus symbols can land, triggering fast-paced action as they add lives, attack, or launch Mass Attack features.
You play the Mine Defender slot machine with 100 coins for stakes of 0.20 to 100.00. It’s easy to pick a suitable bet level with a tap on the coins next to the symbol grid revealing all 12 options, while non-UK players can also buy into the various bonus features.
It’s a complex game, with lots of modifiers and bonuses, so you should read through the paytable before playing with your own money. It’s under the 3 lines button at the top of the game and as well as having further details on the multiple features, it also lists symbol values at the chosen bet level. Symbols pay in any places when at least 7 of the same type appear. Prizes range from 0.2x to 5x the bet with from 7 to 15+ blue crystals, reaching 1x to 100.00 when a giant white crystal lands.
If you are a mobile games player, you’ll find that Mine Defender works perfectly well on iPhones, iPads, Android, and Windows devices at our recommended mobile casino sites. And you can even play with one of the top casino sign up bonus offers.
Every time you get a win the symbols involved explode and trigger cascades of those above. New symbols drop in from the top and you get an unlimited number of cascades for as long as they lead to further wins.
Robots trigger Hero Drops, which act like free spins. The hero shoots robots who have from 1 to 3 lives and if any reach the bottom they remove 1 of the hero’s 3 lives. Each destroyed robot turns into a crystal or bonus symbol, then its value moves to a meter. If the count hits 50 it launches the Final Boss battle. The Final Boss is a 3x3 robot with 50 lives and a trophy coin. Defeat him to win the values of any multipliers built in the round, multiplied by his trophy coin value. Mini boss robots cover 2x2 sections and have 10 lives, plus they hold lower value trophy coins. Hero Drops continue until he runs out of lives.
A wide range of feature symbols can land at any time –
Life – The red heart adds 1 life to the hero, and up he can have up to 3 in a meter.
Shot – Adds an extra shot to his arsenal, to a maximum of 3.
Spread – Upgrades the shots to 3 projectiles.
Wild - A multicolour wild crystal can act as others, improving wins, or counting as another symbol to create a winning combination.
Mystery – Reveals other feature symbols, robots, or wilds.
Coin – Pays instant prizes and adds to a global multiplier meter.
Multiplier – Adds its value to the meter.
Airstrike – Removes 3 lives from 1 – 6 enemy robots.
Laser – Removes 3 lives from all enemies in a straight line.
Pushback – Moves enemies and bosses back 1 row from the hero.
Bomb – Removes 3 lives from all enemy and boss symbols.
Land 3 bonus symbols to trigger a Mass Attack. The hero moves to the centre of a circular grid where enemies attack from all sides. Crystals, robots, and features are the same as in the base games, but you have a better chance to reach the Final Boss where any multipliers built during the round carry across. Mass Attack continues until you lose all 3 lives or get to the Final Boss battle. Once again, you win his trophy coin value, combined with any multipliers if you remove all 50 lives from the 3x3 size Final Boss.
This high volatility game comes with the standard returns of 94.00% seen across the ELK Studios range. It’s a low rate and a perpetual issue with slots from this provider.
You can win as much as 10,000x the stake as you play the Mine Defender slot machine, which equals a huge 1,000,000.00 at the maximum 100.00 bet.
Apart from the low returns, this is a highly entertaining slot which packs a lot of modifiers, features, and rapid-fire gameplay onto the reels. It can be hard to keep up with the explosions, robot attacks, cascades, and free games, but there’s certainly no lack of excitement.
You can get win after win as reels cascade and claim big wins as you destroy robots, build multipliers, and take on the Final Boss in an epic battle in outer space.
If you enjoy classic arcade games but want similar action for real money prizes, then be sure to visit our top-rated uk casino sites where the Mine Defender slot joins the rest of the ELK Studios range.
Mine Defender features colourful crystals, along with robots of various sizes, and a wide range of feature symbols on a 5x6 grid. An outer space setting makes it look like a classic game such as Space Invaders.
If you want to play a slot with lots of bonus features, then don’t miss out on Mine Defender, as it comes packed with extras. Cascades, multipliers, respins, free spins, wild substitutions, and giant robots with coin values are just some of the features ready to explore.
You can play a free version of the Mine Defender slot on this page. It’s the perfect introduction to the game and one of many free slots available to try out across the pages of gambling.com.
Mine Defender has a similar style to other arcade themed slots such as Space Wars from NetEnt, StarQuest by Big Time Gaming, and Energoonz from Play’n GO. You’ll find these and many other space themed games at the best casino sites.
ELK Studios make the Mine Defender slot machine. It joined others in their range, including Valhall Gold, In The Zone, and ZapLab at our approved casinos on 6th May 2025.