Mainframe Defenders: Meltdown - Prologue Synthetic Domain · 2021-06-02
Steam
Indie Strategy Free To Play
Mainframe Defenders: Meltdown - Prologue is a free version of the turn-based tactical game Mainframe Defenders with a focus on interesting items and customization. Combine upgrades and collected loot to protect the Stargazer complex.
97%
positive of 37 reviews
200,000–500,000
owners (SteamSpy est.)
0 players in-game as of 2026-08-30 04:00 UTC (census sample)
Health check Quiet
· 0 players in-game at the last census sample. · 9 reviews in the last 8 weeks (~1/week). · Review velocity down 31% vs the prior 8 weeks. · Top 79% of 18,216 Indie games in the census by review count. Review momentum Positive Negative
12 12 2021 2026 Week of 2021-06-01: 12 positive Week of 2021-07-01: 1 positive Week of 2021-08-01: 3 positive Week of 2021-09-01: 3 positive Week of 2021-11-01: 3 positive Week of 2022-01-01: 1 positive Week of 2022-01-01: 1 negative Week of 2022-03-01: 1 positive Week of 2022-04-01: 1 positive Week of 2022-09-01: 1 positive Week of 2022-12-01: 1 positive Week of 2023-03-01: 1 positive Week of 2023-04-01: 1 positive Week of 2023-07-01: 1 positive Week of 2024-01-01: 1 positive Week of 2024-02-01: 1 positive Week of 2024-04-01: 2 positive Week of 2024-05-01: 1 positive Week of 2025-11-01: 1 positive Week of 2026-05-01: 1 positive Week of 2026-06-01: 1 positive Weekly review counts (Steam review histogram). Positive above the line, negative below. Players online 0 0 2026-08-07 00:00 — 0 players 2026-08-07 08:00 — 0 players 2026-08-07 16:00 — 0 players 2026-08-08 00:00 — 0 players 2026-08-08 08:00 — 0 players 2026-08-08 16:00 — 0 players 2026-08-09 00:00 — 0 players 2026-08-09 08:00 — 0 players 2026-08-09 16:00 — 0 players 2026-08-10 00:00 — 0 players 2026-08-10 08:00 — 0 players 2026-08-10 16:00 — 0 players 2026-08-11 00:00 — 0 players 2026-08-11 08:00 — 0 players 2026-08-11 17:00 — 0 players 2026-08-13 00:00 — 0 players 2026-08-14 08:00 — 0 players 2026-08-15 15:00 — 0 players 2026-08-16 23:00 — 0 players 2026-08-18 07:00 — 0 players 2026-08-19 15:00 — 0 players 2026-08-20 20:00 — 0 players 2026-08-22 04:00 — 0 players 2026-08-23 11:00 — 0 players 2026-08-24 19:00 — 0 players 2026-08-26 03:00 — 0 players 2026-08-27 11:00 — 0 players 2026-08-28 20:00 — 0 players 2026-08-30 04:00 — 0 players Concurrent players, hourly average, last 30 days (census samples). Details Windows Linux Single-player Family Sharing
12 supported languages: English, French, Italian, German, Spanish - Spain, Hungarian, Simplified Chinese, Korean, Polish, Portuguese - Portugal, Russian, Japanese
Census log 2021-06-01 First review activity on record (week of 2021-06-01). 2021-06-01 Biggest review week on record: 12 reviews (week of 2021-06-01). 2026-08-07 Highest concurrent player count the census has recorded: 0 (2026-08-07). Computed from census-recorded observations only — dates are observation dates.
Data: Steam Web API & storefront · SteamSpy · CheapShark · Twitch · Epic Games Store · GamerPower. Snapshots recorded continuously by The Game Census.
Not affiliated with Valve. Sales figures are estimates — methodology .