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Celebrate World UFO Day with our Extraterrestrial Selection of Slots

June 12, 2024

World UFO Day is celebrated on 2nd July each year to commemorate the anniversary of the alleged 1947 Unidentified Flying Object crash in Roswell, New Mexico.

In this article, we will look at some of the best intergalactic UFO and alien-inspired slots available online.

Jeff and Scully

Inspired by the cult TV series The X-Files, with its hopeful Fox Mulder and cynical Dana Scully, Jeff and Scully is about, as the developer put it, “Area 51, UFOs and E.T.” The game’s layout is a 7×7 grid with Area Wins.

With this new mechanic, players win a winning combination as soon as they land four matching symbols in the corners of the area, so the larger the area, the bigger the win.

On Jeff and Scully, players have the chance to wager from 20p up to a maximum of £100 per spin. The standard range of stakes for ELK Studio slots. Players can change their bet amount using the ‘Coins’ icon.

The RTP of Jeffy and Scully is 94% which is the only RTP offered by ELK Studios and it will be exactly the same at each of the best online casinos for UK players.

The win combinations will appear quite frequently, as this slot has a hit frequency rate of 36.2% (one out of 2.87 spins.)

The volatility level of the Jeff and Scully slot machine is placed around medium to high (7/10). The last feature is the maximum win, which is x10,000 a player’s bet.

Stars Invaders

Aliens are invading our Earth, and apparently, they are not in the mood to make friends! Stars Invaders, an online slot created by The Stars Group, is about angry aliens. 

Graphically, the slot features symbols in high-saturated exact colours, a machine with a set of reels that looks like it was built by aliens, and an alien background, which almost certainly looks a lot like outer space.

Stars Invaders is a three-reel, five-payline slot with six standard symbols – one planet that resembles Saturn, a planet with two rings around it, a red planet, a UFO, a comet and a green alien. 

Three identical symbols on one line will award players a cash prize, while mixed aliens and UFOs or planets will also award prizes. 

The logo of the slot is a wild symbol, which can substitute an absent standard symbol. It can also multiply winning combinations by up to five, if it has a multiplier on it. 

This slot could randomly award players with a bonus game, which can lead them to one of the four progressive jackpots.


Visitors slot takes place on a 5×5 grid that allows players to fly over a small “secret town” where “prankster aliens” are wreaking havoc. 

Players can benefit from respins, UFO modifiers such as expanded symbols, extra wilds, and multipliers.

The action comes with bonus round features, where the silver UFOs create multiplier frames that are doubled up to x4,096.

Payouts up to x10,000 are possible on this medium volatility and somewhat unusual ELK Studios title.

The five premium symbols of the game look like different-coloured houses with a small garden, as well as a fountain, creating a small suburban town with each spin. The low-value royals are shaped like different crop circle formations, and the ETs abduct cows with multiplier values. 

Visitors is certainly one of the better alien abduction games out there.

World UFO Day

So, if players can’t get to Roswell to visit the alien crash site or just fancy a little bit of UFO action in their slot games, there is plenty of choice – just remember – we are not alone!