Mainframe
Mainframe is roguelite tower defense Currently the game features - 3 Campaign Sectors, featuring 24 total levels - 12 Unique Towers, each with there own 3 pathway ultimates & visuals - 5 Detailed Bosses - 12…
Mainframe is an arcade developed by Sidb, released 19 December 2025 on Web browser.
What Mainframe is
Mainframe is an arcade game developed by Sidb and released in 2025. It is available on Web browser only.
The premise, in the publisher's words
Mainframe is roguelite tower defense Currently the game features - 3 Campaign Sectors, featuring 24 total levels - 12 Unique Towers, each with there own 3 pathway ultimates & visuals - 5 Detailed Bosses - 12 Unqiue Enemies - Extensive Skill Tree - Alot of upgrade cards that i gotta count.
How it plays
It is played from a bird view / isometric perspective. Its themes are sandbox. It is a single-player game with no multiplayer component.
What it launched against
Mainframe launched on 19 December 2025, within three weeks of Metroid Prime 4: Beyond, Routine, Marvel Cosmic Invasion and Rhythm Doctor.
Released around the same time: Metroid Prime 4: Beyond, Routine, Marvel Cosmic Invasion, Rhythm Doctor.
Screenshots
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Quick answers
Mainframe — frequently asked questions
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