Experiment without consequences
Test new mods, try overhauls, break things. Roll back instantly. Your original saves are always safe.
Windows only. No sign-up required.
Modding is risky business
Every modder knows the pain of a broken save. It shouldn't cost you hours of progress.
Mod conflicts break saves
Install the wrong mod or update in the wrong order, and suddenly your 200-hour save won't load anymore.
Testing is risky
Want to try a major overhaul mod? You're gambling your current playthrough. Manual backups are tedious and easy to forget.
No easy rollback
When something breaks, you're left digging through folders, hoping you made a backup. Usually, you didn't.
Mod with confidence
Tachyon gives you the safety net every modder needs.
Timeline Branches
Create a new timeline before installing mods. If things break, your original playthrough is completely untouched.
Instant Rollback
Something went wrong? Roll back to any previous save state in seconds. No digging through folders.
Automatic Snapshots
Tachyon captures save states automatically as you play. Even if you forget to backup, you're covered.
Modlist Isolation
Keep separate timelines for different mod setups. Vanilla, lightly modded, heavily modded - all coexisting.
The safe modding workflow
Three steps to mod without fear.
Create a snapshot
Before installing a new mod, create a snapshot or branch a new timeline. One click.
Install and test
Install your mods, fire up the game, and test. Play as much as you want.
Keep or rollback
If everything works, keep playing. If not, roll back instantly. No progress lost.
Real-world examples
See how Tachyon helps modders in common scenarios.
The Overhaul Experiment
You want to try Requiem, a major overhaul that changes everything. It might not be for you.
Branch a new timeline, install Requiem, play for a few hours. Decide it's not your style? Switch back to your original timeline instantly - your vanilla-ish playthrough is exactly where you left it.
The Script Conflict
A new mod update causes script conflicts. Your save loads, but the game is broken.
Roll back to before the mod update. Your save is intact. Wait for the mod author to fix the issue, or find an alternative mod.
The Parallel Playthroughs
You want to play vanilla with your friend, but also have a heavily modded solo farm.
Keep separate timelines for each setup. Switch between them instantly. No manual file juggling.
Perfect for these games
Tachyon works with all your favorite moddable games.
Skyrim
70,000+ mods
Fallout 4
40,000+ mods
Stardew Valley
5,000+ mods
Rimworld
15,000+ mods
Baldur's Gate 3
Growing scene
Cyberpunk 2077
5,000+ mods
The Witcher 3
6,000+ mods
Monster Hunter
Active modding
Ready to mod fearlessly?
Stop gambling with your saves. Get Tachyon and mod with confidence.
Download Free BetaWindows only. No sign-up required.