
No revenue estimate for GOG — its rating/review counts don't calibrate to sales the way Steam's do. The Steam version is estimated at $87.3K — a different platform, not this one.
The free demo version of Mainframe Defenders is available on GOG.COM. You can download it here MAINFRAME DEFENDERS - tactical retrofuturistic strategy game. A computer virus has infiltrated the Stargazer research complex. Most of the robotic units are controlled by the virus. Lead a squad of 4 prototypes on a mission to defend complex mainframe. You'll have to repel assaults, destroy unit fabricators, download valuable data, clear infected nodes, and do more on your way to the deepest parts of the complex. Work with item limitations and drawbacks to build powerful combinations. Destroy your enemies with diverse tactics: overheat them, melt with corrosion, absorb damage, and return fire. But don't rely on a single strategy too much - enemies might have a way to counter it. But above everything else: defend the Mainframe! RETRO STYLE: Graphics, inspired by 80s terminal PC with hybrid synthwave soundtrack. DIVERSE TACTICS: Cook enemy robots to death, bury them under your bullets, eliminate with a single powerful shot, or render your opponents useless with debuffs - this game is designed with a lot of viable strategies in mind. BUILD YOUR SQUAD: Similar to how in card games you have to build your deck, in Mainframe Defenders you have to combine different items with unique abilities, to create an unstoppable squad. Work with item drawbacks or double down on them, creating flawed, yet powerful build! UNIQUE ENEMIES: Enemy squad won't sit idle, though. Each unit has its own role in the squad and designed to counter certain strategies. Pick your targets wisely, or you will lose. PROCEDURAL LEVELS: Hand-made rooms are combined with procedural generation to create random levels. Missions have differing objectives, combined with unique mission conditions. Will you accept the challenge or avoid the unknown and risk falling behind? PROGRESSION SYSTEM: Victory or defeat, the game is not over yet! Unlock new units, each with a unique set of upgrades and load-outs. Unlock new items to bolster your new strategies. Synthetic Domain is a small team of hobbyists with a passion for making games. We are working with limited resources to deliver quality games focusing on polish and execution. We look at indie games, games from the 90s and 00s for our inspiration, hoping to bring some of the spirit of this era to the modern age.
Prices
Each in the currency that store quoted — not converted: the gap between two rows is the publisher's pricing, not an exchange rate.
Every market we collect.
Discounts
Every price cut of more than 20% we have observed, in each market that quoted one, with this game's chart position on either side of it. These are episodes, not a model: a sale is one event, and one event cannot tell you what the next one will do.
For scale, across GOG · Trending · United States over the last 30 days: the 141 chart moves that followed a price cut of more than 20% went a median of 2 places away from #1, and the 6,571 moves with no price cut behind them went nowhere. One store, one chart, one country — it is the only place we have enough observations to say even that.
Prices outside the United States have been collected since 6 August 2026 and chart positions since 19 July 2026, so a cut older than that has no market to compare and a market that joined later has no history yet. Nothing here is converted between currencies.
About

Genres
Stats
How fast this game is gaining ratings — the activity signal available where a store publishes no sales or install numbers.
Measured from our own daily snapshots, not reported by the store. Deliberately not converted into sales: a one-tap rating's ratio to copies sold is unknown on this platform, and guessing it would be worse than leaving it out.
Sums Steam only; GOG, PlayStation, Xbox, Nintendo publish no volume signal, so the true total is higher by an unknown amount.
| Store | Price | Audience | Score | Chart | Est. revenue |
|---|---|---|---|---|---|
GOGYou are here | $0.59−90% | 49ratings | 84% | — | not modelled |
| $5.99 | 795reviews | 88% | — | $87.3K | |
| $3.71−69% | 14ratings | 79% | — | not modelled | |
| $11.99 | 4ratings | 80% | — | not modelled | |
| $2.39−80% | — | — | — | not modelled |
Matched by title — a reused name can pair the wrong games. * is a critic aggregate. Prices and positions are each store's United States storefront; Epic charts worldwide. Audience and Score too, except Steam's, which is worldwide.
Media
Related
Related
Price dynamics, follower growth, revenue and sales trajectories with interactive tooltips
This and every other Pro feature is free until October 20, 2026. A free account is all it takes.
Related
| Game | Estimated lifetime revenue | Reviews | Review score | Price |
|---|---|---|---|---|
| — | 4 | 70% | Free | |
| — | 3 | 100% | $19.99 | |
| — | 16 | 96% | $13.99 | |
| — | 47 | 82% | $9.99 | |
| — | 426 | 86% | $3.75 | |
| — | 30 | 96% | $9.75 |