Outerspace Invaders

Review, Demo Play, Payout, Free Spins & Bonuses

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  • Superb 50s sci-fi style audio-visuals
  • Up to 20 free spins with Zerk Attack feature and multipliers
  • Bonus game with 18 potential prizes
  • Big wins can be tough to land
  • Paytable can be confusing

Outerspace Invaders is an online slot created by Pear Fiction. Game features are expanding wilds, free spins and a pick me bonus in this five-reel, 25-payline slot. This is a medium-volatility game with a 96.01% RTP.


Outerspace Invaders is another innovative and highly entertaining slot from Pear Fiction slots. Using an unusual free spins mechanic, this compelling slot also features wilds and a pick me bonus, all with a twist.

The pick of the bunch is definitely the free spins with the Zerk Attack feature that sees our heroine Rachel splat, shoot, blow up and generally do damage to the alien leader as she fights to get her fiancé Robert back.

She also appears as a stacked wild that replaces all other symbols except the wild and bonus, and there’s a Radar Shootout with different prize levels depending on how many symbols you trigger the feature with.

Outerspace Invaders is definitely feature-packed and plays seamlessly on desktop, mobile and tablet in portrait and landscape mode. The paytable can seem a little overwhelming, and we definitely recommend a few demo mode spins of this out-of-this-world game.

Theme, Graphics & Soundtrack

When Rachel Paige’s fiancé is abducted by invading aliens, she decides to get even. Arming herself with a shotgun, she sets out to get her revenge on the many-tentacled Zerk and teach him a lesson he won’t forget.

Packed with memorable characters, the cinematic opening movie really sets the scene here. Outerspace Invaders is one of the best-looking space themed slots you’ll play with its on-point 50s comic book styling and razor-sharp graphics.

The transparent reels are set against the devastated suburb where the alien ship has landed, and screams and strange noises can be heard above the brilliantly spooky, spacey soundtrack.

The character symbols are really well done, and though Pear Fiction have opted for brightly coloured royals, they’re done in a spook NASA/sci-fi style that fits right in with the theme.

There are 13 symbols in the game with the paying symbols split between Rachel, Robert, Zerk, the General and a Soldier and the 10-A royals.

Outerspace Invaders

RTP & Volatility

This medium-volatility slot with a 96.01% RTP should have wide appeal, although the top win of 1,800x your stake may not attract the real high-rollers.

How to Play Outerspace Invaders

Superb graphics are one of the hallmarks of Pear Fiction slots, and the player interface and game controls are presented in a streamlined cluster of icons. If you haven’t played slots by this developer before, here’s how to get started:

1. The main game controls can be found by clicking the Menu icon at the top right. This opens up a range of options:

- Total Bet menu (poker chip): select your stake with a single click.
- Autoplay (circular arrows): select up to 2000 spins with optional win and loss limits.
- Paytable (paytable): information on paylines, payouts and bonus features.
- Settings (gear icon): control your sounds and visuals and set up quick spin options.
- ?: game rules.

Use the back arrow to return to the main game screen

2. If you didn’t already set your Total Bet, click the poker chip icon to open up the bet options.

3. When you’re ready to play click the Autospin icon or the Spin button to launch your game.

Enjoy your spins on Outerspace Invaders responsibly by setting a session budget and taking frequent timeouts.

Bet Sizes & Paytable Wins

There’s a healthy bet spread in Outerspace Invaders with spins costing from 0.25 to 125.00 credits across all 25 fixed paylines.

This slot doesn’t have the richest paytable we’ve ever seen, and big wins are rare. These are the maximum 5OAK wins that are calculated in multipliers of your stake:

- Rachel pays 200x
- Robert pays 20x
- Zerk pays 10x
- General pays 8x
- Soldier pays 4x
- A & K pay 1.6x
- 10-Q pay 1x

Bonus Features

This slot really shines when it comes to the perfectly integrated features, which are a laugh a minute, especially the Rachel’s Revenge free spins. The paytable for this slot can be a little confusing with so much bonus action, so we took a trip into the outer limits of the paytable and here’s what we found:

Rachel Expanding Wilds

Help liberate paytable wins with this expanding symbol that fills the reel for all-reel, multiple-payline wins.

Rachel’s Revenge Free Spins

This is the centrepiece of this narrative-driven slot and involves Rachel trying to save her fiancé by attacking the many-tentacled Zerk with a baseball bat, a shotgun and a hand grenade.

Land three, four or five scatter symbols to earn 8, 12 or 20 free spins with a new paytable and the special attack symbols. Land those and watch Rachel batter the alien leader.

Defeat him by eradicating his life points and you’ll save Robert and earn a game multiplier up to 10x on your final win.

Radar Shootout Bonus Game

Shoot down spaceships on the old-fashioned radar screen to earn multiplier prizes that increase depending on the number of bonus symbols that triggered the feature up to a top prize of 250x your stake.

Overall Review: Our Verdict

Pear Fiction slots do things differently, and the combination of creative features and superb audio-visuals makes their slots highly playable. While the 1800x top win won’t be rich enough for high-rollers, it’s perfectly pitched at casual gamers who like a hefty element of entertainment with their gameplay.

Also recommended is the branded Mars Attacks online slot from Blueprint Gaming based on the movie.

Disclaimer: Outerspace Invaders trademark / license is owned by Pear Fiction. This site is not endorsed by Pear Fiction.

Slot Data
Slot Name: Outerspace Invaders
Software: Pear Fiction
RTP: 96.01%
Volatility: Medium volatility
Paylines: 25
Reels: 5
Min Bet (all lines covered): £0.25 (GBP)
Max Bet: £100 (GBP)
Top Win: 1800
Features: Bonus Game, Wild Symbol, Free Spins, Expanding Wilds, Sub Symbols In Feature, 5 Reels, Medium volatility
UK Available in GB? Yes. Pear Fiction have a UKGC license and are allowed to offer their games at UK licensed casinos.


What is the RTP of Outerspace Invaders?

The theoretical payout from this slot is 96.01%.

What’s the volatility of Outerspace Invaders?

This is a medium-volatility slot that will suit most players.

What is the maximum win in Outerspace Invaders?

The maximum win is 1,800x your stake.

Does Outerspace Invaders have free spins?

You can earn up to 20 free spins when you land three or more scatter symbols. Free spins feature the Zerk Attack feature with extra game multipliers.

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