
Mainframe
A downloadable game for Windows
MAINFRAME
Roguelite tower defense. Build, Upgrade, Survive
Mainframe is a simple but tactical tower defense, each run is unique due to the card system that can influence a varity of things and stats, from specific tower buffs to global buffs but also enemys with Challenge Cards. Thatll force you to also pick specific buffs enemys will get for said run.
Currently Includes
- 4 Campaign Sectors — 32 total levels.
- 13 Unique Towers — each with 3 pathway ultimates and visual upgrades.
- 8 Detailed Bosses — plus 1 cinematic boss fight.
- 20 Unique Enemies — distinct behaviours, bosses included
- Extensive Skill Tree — still a (WIP but it works)
- A lot of upgrade cards — and whatever they do lmao

The Card System
- System Upgrades — enhance your overall gameplay, towers, economy, and more.
- Base Upgrades — appear at the start and every 5 waves. These shift your run drastically.
- Challenge Cards — buff the enemies themselves, dropping every 3 waves. Requires Careful picking.

Status
The game is still being worked on, just obviously takes longer with each thing as i focus on random things that pester me lmao, this whole thing is just a passion project so that i can have fun and see what bs can be shoved into something like this.
If you find issues, please tell me on the Discord or in the comments below.
♥
| Updated | 9 hours ago |
| Status | In development |
| Platforms | Windows |
| Release date | Dec 19, 2025 |
| Author | Sidb |
| Genre | Strategy, Simulation, Survival |
| Tags | 2D, Indie, Real time strategy, Roguelike, Roguelite, rts, Tower Defense |
| Average session | About a half-hour |
| Languages | English |
| Inputs | Mouse |
| Accessibility | One button |
| Links | Discord |
| Content | No generative AI was used |
Download
Click download now to get access to the following files:
Development log
- Mainframe v1.4.0 - Sector 4 Glaceria12 hours ago
- Mainframe v1.3.0Mar 08, 2026
- Mainframe v1.2.0 - Sector 3 QuantumDec 28, 2025
- Mainframe v1.1.0Dec 20, 2025










Comments
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Goated! some ui errors. tutorial on level 0 didnt work
but this is far better then most of the other tower defense slop on here
ill address it in the next update ty!