Science fiction, and by association, aliens, has been around for longer than we realise. The first known fictional work that included ideas such as space travel and aliens was written in the second century AD, although Science Fiction in the form that we know it today didn't materialise until the 19th Century, with authors like Mary Shelley, Jules Verne and H G Wells. As the genre developed, focusing on the products of technology, vehicles that could take characters through time, to any place on Earth, or out into space, encounters with aliens were inevitable. Space aliens have captured the imaginations of audiences ever since - they've featured in films, TV, literature, magazines and comic books. When arcade games appeared, aliens were a natural theme to use, since the machines were the new technology of their time. The ability to pilot your own craft and shoot at attacking alien spaceships was a unique and exciting experience in the '70s and '80s. As technology has developed to run complex games online, the stunning graphics can fully immerse the player. It's unsurprising then, how popular the category is in the world of online slots, with a plethora of Aliens slot games, from 3 to 5 Reels Slots with a multitude of cleverly integrated features. Space Invaders alone has inspired slot machines that switch between the base game reels and a skill-based round of the classic arcade game, as well as online Aliens slot games that are cleverly designed to make you feel like you're sitting in front of one of those retro arcade game cabinets. Click here to read more.
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Movie and TV inspired slots
There's so much more to inspire in the genre, from War of the Worlds to ET and everything in between. Aliens by NetEnt, inspired by the 1985 movie of the same name is a 15 payline 5 reel slot, featuring the terrifying aliens, their hive, and their eggs as symbols on the reels. The game is divided into three levels, the first which has you scanning infested areas and collecting nine symbols in order to progress to Level 2. This is the encounter - where all multipliers from Level 1 are held and applied to Level 2 wins. Then, you're on to Level 3, the Hive, where the aim is to destroy it. Aliens holds the suspense of the movie through its game structure and some fantastic soundtrack as you progress. It's a great example of some of the free NetEnt slots to try in this category.
TV-inspired Aliens slot game The X Files looks and sounds atmospheric. The spooky backdrop of a forest at night, complete with the sounds of nocturnal animals, contrasts with the sleek design of the symbols, which feature Mulder, Scully, torches and alien handprints. A mystery multiplier spins within its own symbol as the reels are spun, giving up to five times the win if you're lucky.
Original games
Not all Aliens slot games are inspired by the big blockbusters - in fact, there are some very good original games in the genre, too. Habanero's Little Green Money is one such example, a tongue-in-cheek spoof that takes its inspiration from the Roswell incident and Men In Black, and has everything from an animation abducting cattle to the mothership, to symbols depicting rayguns, crop circles and more.
Aliens slot Area 51 by iSoftBet is based on the popular conspiracy theories and UFO folklore that surround the secret military base in Nevada, and is full of symbols depicting cartoon aliens and science laboratories. Even the playing card symbols are styled in the form of test-tubes full of goo. Among its bonus features is a game where you pilot a UFO and select soldiers to abduct to increase your winnings.
Playtech's Cosmic Disco combines crazy aliens, mirror balls, cocktails and disco music to create an out of this world dance theme. A relatively simple game design, its scatters offer up to eight free games where the UFO wilds can accumulate for great wins. And like most online slots, it can be played on mobile and tablet, too.
Mixing it up
Crossovers abound, too - Pharaohs and Aliens from BeeFee, for instance, combines the two genres seamlessly, with beautiful graphics against a moonlit backdrop of pyramids, where, blink and you'll miss it, a UFO very occasionally zips in and out of view. For the truly weird, Booongo's Kangaliens blends Kangaroos and other Australian wildlife with visitors from outer space - proof, if you ever needed it, that the Aliens slot category truly has something for everyone! The best way to find out what Aliens slots have in store is to play free slots and try them out for yourself.
Even if you're not a big sci-fi fan, it's not difficult to find a slot in the Aliens category that will have you enchanted. Have fun!