Isyium

Isyium

Glenn Main · December 13, 2016 · Simulation

Buy Isyium from Steam at $0.99 — the cheapest of 1 store we compare.

PC
Mixed60% · 10
Best price
$0.99
lowest tracked $0.49
Steam Buy at Steam

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Where to buy Isyium — official stores

Steam
Steam
Standard Edition · Steam
$0.99
Buy

Isyium price by region

Isyium costs €0.75 in Europe (EUR), £0.79 in the United Kingdom, $0.79 in Georgia (USD), $0.99 in the United States, CA$1.09 in Canada, NZ$1.19 in New Zealand, A$1.50 in Australia, R$2.19 in Brazil and zł3.59 in Poland right now.

Cheapest Isyium offer in each region, in local currency
RegionBest priceOfficial storeKey shopStores
Europe (EUR) €0.75 €0.75 — 1
United Kingdom £0.79 £0.79 — 1
Georgia (USD) $0.79 $0.79 — 1
United Statesyour region $0.99 $0.99 — 1
Canada CA$1.09 CA$1.09 — 1
New Zealand NZ$1.19 NZ$1.19 — 1
Australia A$1.50 A$1.50 — 1
Brazil R$2.19 R$2.19 — 1
Poland zł3.59 zł3.59 — 1

Each row is a real price from that region's own stores, not a currency conversion, so the figures are not directly comparable. Switch regions in the header to shop the one you buy in.

Screenshots

About Isyium

Features
  • Over 40 original compositions - sci-fi electro tunes to immerse you into this altered world. (runtime 100+ mins)
  • Easy to learn - just hit a button when the atoms collide!
  • Deeper strategy with improved skill and higher competencies.
  • Overlay systems - Easers to ease targeting of atomic hits (when earned), a Sight for aligning hits, a 'Resist-Vaporizing' meter to impede a vaporizing event, a Qenoscope to vanquish Antimatter Radicals, internal lighting options to favor tunnel imagery, options for spoken voice and/or continuous music with shuffle option by switch.

About
Isyium is a unique combination of simulation, strategy and casual arcade (if played in that spirit) with an abridged story mode.

Set in an orbital accelerator many years in the future after Earth's untimely bio destruction, you pilot a futuristic - if not altogether rusted and clunky apparatus - called the Spinnercast Module, capable of near light speed as it races through the loop.

Your goal is to create Isyium - a theoretical particle that reverses the effects of Proxectron - the cause of Earth's disaster. (Proxectron was similarly created in an orbital accelerator).

Discovering a casebook detailing the process of defining Isyium, you now run something called a simulant, building particles and logging codes. When eight codes have been defined there is a brief puzzle to solve before uploading them, completing your mission.

Gameplay
From a viewport you interact with particles to form new entities. This is achieved by smashing two atoms then combining their offspring particles to color the core, which eject to one of eight positions in the outer group. At run completion there is a presentation of volumes. Once all colors have been completed, a competency is achieved, resulting in an auto-save and a code written to the casebook's cover.

Strategy is required for mixing colors, maintaining the central core's mass, destroying Antimatter Radicals - which can damage your module and end your run early, along with using Discontinuous Anomalies to increase atomic velocities (and improve the mass of resulting particles) or contiguous atomic hits to increase velocity as well as earn Easer points and resist Vaporizing Rays.

Balance your particle combining choices with elimination choices - either make a large amount of particles with greater mass (along with their orbiting satellites) to define harder to achieve, larger-sized colors sooner, or keep runs lean and eliminate threats early, requiring more runs overall.

To assist, your module contains numerous dials and switches that link to tools, as described in the manual.

Isyium — game info

Platforms
Windows
Player modes
Single-player
Controller
Full controller support
PC Game Pass
Not included

What Steam players say

Recent verbatim reviews from Steam — separate from playze.io community reviews below.

Recommended Jan 31, 2024
I am 32 years old. My ex-wife and I have a daughter together, and we adopted our son together. Both are now 4 years old. When we were going through our separation, I felt lost and unhappy. I was self-destructive. One day, I was so angry with everything spiraling out of control that I punched a concrete wall in a moment of overwhelming emotion. This resulted in breaking my fifth metacarpal in my right hand—the hand I worked with, played games with, and used to carry my children to bed—the hand I desperately needed to ensure I could continue providing. Upon learning the severity of the self-inflicted damage, I became almost suicidal. Keep in mind that just a few months before this, I was the happiest man, with no history of depression or anxiety. I had never experienced anger outbursts, nor was I the type to break down and cry, but I was in a tough situation that truly prevented me from seeing the light on the other side. With nothing better to do, I looked for a game I could play WITH ONE HAND while recovering. Somehow, I stumbled upon this game and read some of the comments. I decided it was worth a try... I must admit I didn't beat the game, nor did I play as much as some of y…
3 found this helpful
Not recommended Jul 16, 2017
This is a simple rythm/soundtrack game. You might as well download some techno and watch visualizations like Milkdrop, then you don't have to press the space bar every now and then (but you can if you want to - either way, it's free, unlike this). They tried to dress it up as some kind of simulation but it's just techno with a "woah dude" pattern on the screen. This barely qualifies as a game.
2 found this helpful
Recommended Jun 9, 2026
Isyium is an unconventional science-fiction strategy and simulation game developed and published by Glenn Main that takes players far beyond the boundaries of traditional genre design. Instead of focusing on combat, exploration, or resource gathering in a familiar sense, the game centers on scientific experimentation inside a futuristic orbital accelerator. Through particle manipulation, strategic decision-making, and a gradual process of discovery, Isyium creates a distinctive experience that feels part puzzle game, part simulation, and part abstract science-fiction adventure. Its unusual premise immediately sets it apart from more conventional indie titles and establishes an atmosphere driven by curiosity and experimentation. The narrative is built around a future in which humanity faces the consequences of a devastating catastrophe linked to a dangerous particle known as Proxectron. In response, scientists have theorized the existence of a particle called Isyium, believed to possess the potential to restore what has been lost. Players are placed in control of a specialized machine known as the Spinnercast Module, a device racing through an orbital accelerator while conducting e…
Recommended Sep 9, 2019
pretty good game

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