Screenshots
Watch trailer on Steam ↗Beast Bastion
Bit Constellation · Published by Bit Constellation
Last updated 5 Sept 2026
A Roguelite auto-chess tower defense game. Recruit unique units, combine them with towers, and build synergies and builds. Defeat bosses to recruit them into your legion, and craft your ultimate roster through randomly generated runs.
Action, Adventure, Indie, Strategy · 2026 · More free games
About this game
Descend into a forgotten underworld and build your ultimate Bastion.
Enter a forgotten underground civilization and build your army.
⚔️ Auto-Battler Combat
Recruit unique units and deploy them on the battlefield. Every unit has its own abilities, traits, and synergies.
🏰 Roguelite Progression
Procedurally generated maps, events, shops, treasures, and elite encounters make every run different.
💀 Defeat Bosses, Recruit Them
Defeated bosses can join your army and become powerful units for future battles.
🛡️ Tower Defense Strategy
Build defensive towers, upgrade their abilities, and combine them with your army to survive endless enemy assaults.
System Requirements
Will my PC run this? →Minimum
- OS: Windows 10
- Processor: Intel Core i3-6100 / AMD Ryzen 3 1200
- Memory: 4096 MB RAM
- Graphics: 128MB，OpenGL 3.3+
- Storage: 512 MB MB available space
Recommended
- OS: Windows 10 / Windows 11
- Processor: Intel Core i5-8400 / AMD Ryzen 5 2600
- Memory: 8192 MB RAM
- Graphics: 512MB
- Storage: 512 MB MB available space
Supported Languages
Latest news
Patch NotesOfficial
Beast Bastion Demo Update – New Gold Unit & UI Improvements
Beast Bastion Demo Update A new update for Beast Bastion is here!New Gold-Generating UnitA new economic unit has been added. Once deployed, it periodically generates gold, giving you another way to build your economy and plan your strategy.UI ImprovementsSeveral parts of the interface have been redesigned and polished to make information clearer and gameplay more comfortable.General ImprovementsThis update also includes many smaller optimizations and quality-of-life improvements across the game.Thank you for playing the Beast Bastion Demo! More improvements and new content are on the way.Read full article on Community Announcements (Archer)Patch NotesOfficial
Demo Major Update
Relic System – Choose relics to customize your build. Better Item UI – View equipment details and combine items directly in your inventory. Element Cards – Choose element cards to grant your towers different elemental damage and trigger elemental explosions.Read full article on Community Announcements (Archer)AnnouncementsOfficial
Demo Update_New Assassin Unit & Battle Rewind Feature
First off, a huge thank you to all the players who took the time to share feedback with us! We really appreciate it. Based on your suggestions, we've now completed both the Assassin unit and the Battle Rewind feature — we'd love for you to try them out. If you have any more thoughts or feedback, please don't hesitate to let us know. Thanks again to everyone who spoke up — your input genuinely helps shape this game. New Unit: AssassinIntroducing the Assassin, a new unit that prioritizes targeting the nearest enemy ranged attacker. This update also adds a positioning mechanic that lets you scout the enemy's unit placement in advance, giving you the chance to strategically position your Assassin for maximum impact. New Feature: Battle RewindFailed a run? No worries. You can now rewind to any of the last three battle rooms you entered. This gives you a chance to rethink your unit compositions and tower upgrade paths before trying again.Read full article on Community Announcements (Archer)Patch NotesOfficial
Demo Update — Summoner Enemies & New Ally System
What's new in this update: Boss Loot: Recruit Enemy Units Defeat a boss and you can recruit the current wave's enemy type to fight alongside your towers. Turn your enemy's strength against them. Summoner Enemies A new enemy type that continuously spawns minions until destroyed. Prioritize them or get overwhelmed.Read full article on Community Announcements (Archer)Patch NotesOfficial
New Update: Difficulty Settings & Speed Control
Hey everyone! Thanks for playing the Beast Bastion Demo during Steam Next Fest!We've pushed a new update with two quality-of-life additions:Difficulty Selection You can now choose your difficulty before starting a run. Hard mode currently increases enemy HP and attack power. In the full release, Hard mode will also introduce special enemy variants with unique behaviors — so this is just the beginning. Speed Control ButtonAdded a speed toggle so you can fast-forward through waves when you're feeling confident. The button will only appear once the battle has started, keeping the UI clean during the preparation phase. — Bit ConstellationRead full article on Community Announcements (Archer)
