Massive Studios (Juice) · Slot
8.2/10Grannies vs Aliens is a slot from Massive Studios (Juice). Spinanigans scores it 8.2/10. The listed RTP is 96.57%, max win is 10,000x your bet. We review every game in demo mode only and never show real-money play.
Reviewed 27 October 2026. Reviewed by the Spinanigans editorial team, demo-play tested. How we review · DisclosureMore Massive Studios (Juice) reviews · What is RTP? · What is volatility? · Best new slotsGrannies vs Aliens is easily the funniest idea in the Massive Studios range, and it's part of the Juice catalogue spreading to new casinos. It's a five reel, four row game with forty paylines. When a VS Wild lands, it expands over the whole reel and a one on one battle begins between the Granny and the Alien. If the Granny wins, that reel turns into wilds, with multiplier wilds of 2, 3, 5, 10, 50 or even 100 times, and several on one payline add together.
If the Alien wins, you're left with a single wild. Three or more scatters trigger Free Games. Each scatter expands its reel and spins on its own for plus one, two or three games, with a minimum of 12. In the bonus, wilds stay sticky, and at the end of a spin the Granny can fly into a Rage that boosts the wilds on the board. Max payout is 10,000 times, 20,000 on the enhanced modes, and the RTP is 96.57 percent.
The bonus buy costs 100 times, with a 500 times option for four scatters. In our demo we played about thirty spins, then bought the 100 times bonus on a two dollar bet. We got seventeen free games, and about 37 dollars back on a 200 dollar buy. One run, and not a promise. The battle is the hook, the theme is silly in the best way, and it's a lot more fun than the premise has any right to be.
8.2 out of 10.
Grannies vs Aliens scores 8.2/10 on Spinanigans. Grannies vs Aliens by Massive Studios, now part of the Juice catalogue: RTP 96.57%, max win 10,000x, bonus buy 100x. Demo-tested review with our verdict, 8.2/10.
The listed RTP of Grannies vs Aliens is 96.57%. RTP is a long-run theoretical average across a very large number of spins, not a promise for any single session.
The listed maximum win in Grannies vs Aliens is 10,000x your bet. Reaching it is rare, and a max win is a cap, not a typical result.
Grannies vs Aliens is developed by Massive Studios (Juice).
Every game is played on demo mode only and scored out of 10 for gameplay, features and overall feel. Videos use AI voice narration over real demo gameplay. See our About and Disclosure pages for details.
Grannies vs Aliens is easily the funniest idea in the Massive Studios range, and it's part of the Juice catalogue spreading to new casinos. It's a five reel, four row game with forty paylines. When a VS Wild lands, it expands over the whole reel and a one on one battle begins between the Granny and the Alien. If the Granny wins, that reel turns into wilds, with multiplier wilds of 2, 3, 5, 10, 50 or even 100 times, and several on one payline add together. If the Alien wins, you're left with a single wild. Three or more scatters trigger Free Games. Each scatter expands its reel and spins on its own for plus one, two or three games, with a minimum of 12. In the bonus, wilds stay sticky, and at the end of a spin the Granny can fly into a Rage that boosts the wilds on the board. Max payout is 10,000 times, 20,000 on the enhanced modes, and the RTP is 96.57 percent. The bonus buy costs 100 times, with a 500 times option for four scatters. In our demo we played about thirty spins, then bought the 100 times bonus on a two dollar bet. We got seventeen free games, and about 37 dollars back on a 200 dollar buy. One run, and not a promise. The battle is the hook, the theme is silly in the best way, and it's a lot more fun than the premise has any right to be. Verdict: 8.2 out of 10. Available at the major crypto casinos. Full review at Spinanigans dot com. Spin-anigans, S-P-I-N.
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