2027 ISS

2027 ISS Slot Review — Endorphina

2027 ISS is a 5-reel, 3-row slot from Endorphina, released on 12 April 2017 and running at 96% RTP with a medium volatility profile. The game sets its scenes aboard an orbiting space station, mixing cosmonaut and station iconography with casino-style symbols across 9 fixed paylines. Maximum exposure on a single spin is capped at 500x the stake, a ceiling that places the title among the steadier, lower-paying machines in its comparison group rather than among jackpot-style slots.

Core Gameplay Experience

The reel layout is compact: 5 reels and 3 rows feed 9 fixed paylines, a configuration that keeps the maths simple and the round-to-round rhythm brisk rather than sprawling. Stakes scale from 9.0–90.0 per spin, a narrow betting band that suits players who want predictable round sizing over micro-betting flexibility.

Endorphina renders 2027 ISS in 3D, built around a dark blue and black palette that evokes a station interior set against deep space, with planetary backdrops and an adventure framing running through the reels. Symbols borrowed from a casino floor, including dice and a roulette wheel, sit among the paytable icons, an unusual pairing of orbital setting and gambling imagery that gives the slot its own visual identity within the Sci-Fi & Space theme category.

Features and Mechanics

The Cosmonaut Woman Wild substitutes for regular paying symbols and doubles winning combinations in which it participates. The ISS Scatter activates Unlimited Free Games when three or more symbols appear on the reels. During Free Games, all prizes receive a 3x multiplier.

The bonus continues while at least one Fuel Cell remains on the counter. Fuel symbols add a cell and pay 2x the total bet, while Hyper Space Jump symbols consume a cell and also pay 2x the total bet. The game also includes a classic Risk Game and Bonus Pop, although Bonus Pop availability depends on the jurisdiction.

RTP, Volatility and Payout Model

2027 ISS has a published RTP of 96.06% and a medium-to-high volatility profile, according to Endorphina. Its Unlimited Free Games feature applies a 3x multiplier to prizes while Fuel Cells remain available. Wild symbols can also double winning combinations.

The developer lists a payout of 1,000x the base bet for five Wild symbols and 500x for five Scatter symbols, but does not identify either amount as the game’s overall maximum win. Players should verify the applicable payout limit in the game’s information screen rather than relying on the 500x ceiling shown in some third-party descriptions.

96% sits in the 45th percentile of the 4,481 slots in our catalog with a published RTP, against a catalog median of 96% — a figure in line with the typical payout rate rather than standing apart from it. Medium volatility is the profile shared by 33% of the 4,748 slots in the catalog, so 2027 ISS sits inside a well-populated middle ground rather than at either risk extreme. The 500x maximum win is higher than only 11% of the 3,493 slots with a published ceiling, which marks it as a conservative cap next to titles built for four- or five-figure multipliers.

Similar Endorphina Slots — Comparison

Within this group of five Endorphina slots at medium volatility and up to 10 paylines, 2027 ISS ties for the lowest RTP in the set at 96%, with Dazzling Crown’s 96.05% at the top. Diamond Chance and 4 of a King sit at the catalog median exactly, while 7 Bonus Up trades paylines for a tighter 5-line structure; a player choosing purely on long-run payout rate would look to Dazzling Crown first and treat 2027 ISS as the pick for its free spins and gamble-feature combination instead.

Other Classic and Feature Slots — Comparison

These four comparison titles have published RTP figures between 96.11% and 96.82%, compared with 96.06% for 2027 ISS. Their features and volatility profiles differ, so they should not all be described as Free Spins equivalents. Published maximum wins include 5,000x for 20 Flaring Fruits and 10,000x for the two Dream Catcher titles, although the six-reel version also includes a progressive jackpot. The overall maximum win of 2027 ISS remains to be verified independently.