What is PROJECT TACHYON?
This single-player sci-fi action roguelite follows an agent who travels back in time to prevent nuclear winter after an AI rebellion. You fight through changing stage routes with melee and ranged weapons, choose upgrades that can carry penalties, and face giant bosses.
For you if...
- +you like mixing melee and ranged combat against bosses
- +you enjoy changing routes and risky upgrades between runs
Not for you if...
- −you dislike repeating stages and rebuilding between runs
- −you prefer upgrades without the risk of penalties
What players say
86% of 145 reviews are positive
Players enjoy the action but want more variety in weapons and stages.
Screenshots and trailer
PROJECT TACHYON system requirements
As published by the developer.
Minimum
- OS
- Windows 10
- Processor
- Intel Pentium G630 @ 2.70GHz
- Graphics
- Intel HD Graphics
- Memory
- 4 GB RAM
- Storage
- 2 GB available space
- DirectX
- Version 11
PC version details
DRM, required accounts, controller support and Steam features.
- DRM
- None declared on Steam
- Controller
- Keyboard and mouse
- Platforms
- Windows
- Achievements
- 32
- Steam features
- Cloud saves, Family Sharing
Steam Deck: Playable
- Some in-game text is small and may be hard to read
- All functionality is accessible with the default controller configuration
- Shows Steam Deck controller icons
- Default graphics settings perform well on Steam Deck
Multiplayer and co-op
Languages
Full audio: Japanese, Korean. Text only: English, Simplified Chinese, Traditional Chinese.
Tags
- Action
- Shoot 'Em Up
- Roguelike
- Combat
- Action Roguelike
- Hack and Slash
- Bullet Hell
- Sci-fi
- Futuristic
- Female Protagonist
- Time Travel
- Singleplayer
- Roguelite
- Robots
- Cyberpunk
- Multiple Endings
Recent updates
- Aug 12, 2025 · [Notice] Version 1.3.0 Update (Patch Notes)
- May 23, 2025 · [Notice] Version 1.2.0 Update（Patch Notes）
- Apr 1, 2025 · [Notice]1.1.1b Update (Patch Note)
- Mar 7, 2025 · [Notice]1.1.0b Update (Patch Note)
- Feb 19, 2025 · [Notice]1.0.4 Update (Patch Note)
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