Blackhole

Blackhole is a slot from developer GRIMFORGE, confirmed with an RTP of 95%, though detailed reel, payline and volatility information hasn't been published yet for this title. The name points clearly toward a cosmic, space-horror theme — expect swirling void imagery, distant stars being pulled into darkness, and a symbol set that likely leans into astronomical and sci-fi iconography rather than anything grounded or familiar.

A cosmic, high-stakes atmosphere

GRIMFORGE's naming style suggests a developer leaning into darker, more intense visual territory, and a game called Blackhole gives plenty of scope for dramatic lighting effects, deep-space soundscapes and a genuinely tense atmosphere as the reels spin. It's a theme that stands out from the crowded pack of fruit machines, mythology slots and animal-themed bison games covered elsewhere in this roundup, offering something visually distinct for players after a change of scenery.

Reading the 95% RTP

A 95% RTP sits a shade below the 96% figure many players treat as the standard benchmark for a fair slot, though it remains a common and entirely reasonable return rate across a large portion of the current market. Over a sufficiently large number of spins, Blackhole is designed to pay back £95 for every £100 wagered, with the house holding a 5% edge. It's worth factoring that into your expectations if you're comparing Blackhole directly against some of the higher-RTP titles featured elsewhere on the site.

Volatility still to be confirmed

GRIMFORGE hasn't published an official volatility rating for Blackhole yet, so it's worth treating your opening sessions as a chance to scout the game's natural rhythm. Playing smaller stakes for the first run of spins should give a reasonable sense of how often the game pays and roughly how big those returns tend to be, before scaling your bet size up or down.

Max win and stakes: to be confirmed

No maximum win multiplier or minimum/maximum bet range has been published for Blackhole at this stage. Checking the in-game paytable and info screen once the title is live remains the most reliable way to confirm these figures, since they're often finalised closer to a full release.

Final take

Blackhole's cosmic theme and GRIMFORGE's clearly dark, intense visual style make it a distinctive addition to the slot market, even with a workmanlike 95% RTP and several details still pending confirmation. Once it's available, spin through the free demo at johnessyslots to get a sense of the atmosphere and pacing before deciding whether to commit real money to it.