What on Earth Slot Review

As soon as you load the game up, you’ll be presented with the background noises of an oncoming battle. Then, when you spin the reels, you’ll hear the sounds of bleeping buttons and generic UFO noises overtaking the game, which will, of course, add to the game’s atmosphere. And not only does this game have a modern sort of interface, providing gamers with various different symbols relating to the overall theme, but it also brings in a hint of the classical slot machines by providing certain forms of fruit icons as well. But, a little more on those shortly. What we can tell you from our first thoughts of loading What on Earth up is that we were quite impressed visually and were very eager to play it.

Where to play What on Earth for real money

Basis of this table: the welcome offer each brand publishes for new UK accounts. It is not a list of casinos carrying this game — Lobbies change without notice: check the game is in the operator’s own lobby before you deposit for it.

Apple Pay6 of 8 shown

1. 1

   Jackpot City CasinoBetway Limited · UKGC 39372

   WELCOME PACKAGE100% up to £100+ 100 free spinson a first deposit of £20 or more10x wagering

   TrustlyMaestroOnline since 1998

   Get bonus T&Cs apply · 18+
2. 2

   Swift CasinoSkill On Net Limited · UKGC 39326

   WELCOME PACKAGE100% up to £25+ 100 free spinson a first deposit of £10 or more10x wagering

   Apple PayTrustly

   Get bonus T&Cs apply · 18+
3. 3

   PlayOJO CasinoSkill On Net Limited · UKGC 39326

   WELCOME BONUS50 free spinson a first deposit of £10 or moreno wagering

   Apple PayTrustly

   Get bonus T&Cs apply · 18+
4. 4

   Play Jango CasinoSkill On Net Limited · UKGC 39326

   WELCOME PACKAGE100% up to £25+ 77 free spinson a first deposit of £10 or more10x wagering

   PaysafecardSkrill

   Get bonus T&Cs apply · 18+
5. 5

   888 Casino888 UK Limited · UKGC 39028

   WELCOME BONUS100 free spinson a first deposit of £10 or moreno wagering

   Apple PayTrustlyOnline since 1997

   Get bonus T&Cs apply · 18+
6. 6

   Betway CasinoBetway Limited · UKGC 39372

   WELCOME BONUS150 free spinson a first deposit of £20 or moreno wagering

   TrustlyPaysafecardOnline since 2006

   Get bonus T&Cs apply · 18+
7. 7

   Luxury CasinoApollo Entertainment Limited · UKGC 38620

   WELCOME BONUS100% up to £1000on a first deposit of £10 or more

   MaestroOnline since 1998

   Get bonus T&Cs apply · 18+
8. 8

   Karamba CasinoWhite Hat Gaming Limited · UKGC 52894

   WELCOME BONUS20 free spinson a first deposit of £20 or more10x wagering

   TrustlyPaysafecardOnline since 2005

   Get bonus T&Cs apply · 18+

Show all 8 casinos

Last updated October 12, 2026 · Every brand listed here holds a current UK Gambling Commission licence; the licence holder and account number are printed on the brand’s own row.

Advertising disclosure: Gamblib earns a commission when a reader opens an account through a Get bonus link, and the order of this table is commercial as well as editorial. Commission never changes a published finding, a licence check or a set of terms — see how we rate. Offers and terms are those published by the operator on the date above and change without notice; always read the bonus terms on the operator’s own site before depositing.

18+ only. Gambling should cost no more than you have decided to lose. Free, confidential help in the UK: BeGambleAware, GamCare on 0808 8020 133, and GAMSTOP to block yourself from every UK-licensed site at once. The tools and how to switch them on.

Aliens are on the Hunt

The layout of this game is presented on a five reel and three row display, so you should be quite aware of the familiarity of it all. It’s upon this interface that you’ll find the various different aforementioned icons, starting with the fruit-based symbols. Each of these has been warped in some way by an alien craft, starting with the cherry and orange, both of which are surrounded by flames. There’s also the plum which has a Saturn-like ring around it, and the watermelon with three surrounding pink moons. In addition, there are three other icons – one of them is a green asteroid, an alien craft’s control board, and finally, the shot of the alien peering through the porthole.

Alongside the reels, rows and symbols, you’ll find that the software developer has also incorporated a total of nine different bet lines, and these can be customised to suit your own preferences. This is done either by clicking on one of the numbers down either side of the reels, or by using the ‘Select Lines’ button instead. Further to this, all players can change around the bet they place per spin. Doing this is simple, as a single coin is worth $0.01. This can be increased up to $1, and the amount of these that can be wagered per active line can be switched between one and five, giving you the chance of placing a maximum overall bet of $45 per round.

Evade the Invasion

A game such as this one should definitely have some compelling special features involved within, and this one definitely has these to keep you entertained. The first of these is its wild icon, which is represented by the game’s logo. As a wild, this will stand in for the two higher paying icons on the reels – those being the alien behind the porthole and the spacecraft control panel. Should five of these show up on a winning pay line, you’ll be rewarded with a maximum pay out of 7,500 coins.

Scatter icons have also been incorporated into game play, and there are three of these. They’re all in the form of alien crafts, a blue one, a green one and a red one. Of course, these pay out wherever they show up on the layout, and adjacent scatter wins are added to pay line wins. These multiply your wager staked by a specific amount, with five of the red rocket ship providing a multiplier of times 100.

There’s also the addition of the ‘Beat ‘Em Up’ bonus round, and this is triggered whenever three, four or five red rockets show up in scatter locations of adjacent reels, or when three blue ships or three green ships show up scattered. This bonus round allows you the chance to win up to a 200 times multiplier by choosing objects to reveal random values. This round can lead to further bonus games.

Beat Them Back

This game is a really nice sci-fi offering, and it takes the theme and really runs with it. We enjoy the great graphics and intriguing special features, as well as the inclusive sountrack.