Besiege

Physics sandbox about building medieval machines and demolishing fortresses

Spiderling Studios · Released Feb 18, 2020

Reviews: Overwhelmingly Positive; 95% of 53K
Recent reviews: Very Positive; 87% of 147 in 30 days
Playing now: 246; peak 24h 247
Steam Deck: Playable
Last update: 1 day ago; Sep 21, 2026

What is Besiege?

A physics-based building and destruction game set across four medieval island nations. You assemble machines from modular blocks, then control them to defeat armies, break fortresses, and solve objectives through a 55-level campaign, sandbox stages, and competitive or cooperative multiplayer.

For you if...

+you enjoy experimenting with physics-driven machine designs
+you prefer open-ended sandboxes alongside objective-based levels
+you want cooperative and competitive machine-building modes

Not for you if...

−you need detailed tutorials before tackling complex systems
−you dislike trial-and-error engineering puzzles
−you want straightforward combat without construction or experimentation

What players say

95% of 53,274 reviews are positive · 87% of 147 in the last 30 days

Players praise the flexible construction system, physics-driven destruction, and freedom to create unusual machines. The most common complaint is weak onboarding, with parts and advanced building techniques poorly explained. Recent players also report crashes and startup problems, particularly on Linux.

Screenshots and trailer

Besiege system requirements

As published by the developer.

Minimum

OS: Windows XP 64bit (latest SP)
Processor: 2.2Ghz Dual Core
Graphics: 1 GB Dedicated VRAM
Memory: 4 GB RAM
Storage: 3 GB available space
DirectX: Version 9.0c

PC version details

DRM, required accounts, controller support and Steam features.

DRM: None declared on Steam
Controller: Keyboard and mouse
Platforms: Windows, macOS, Linux
Achievements: 54
Steam features: Workshop, Family Sharing, Trading cards

Steam Deck: Playable

Default controller config not fully functional
Sometimes shows mouse, keyboard or non-Deck controller icons
Some text entry requires manually opening the on-screen keyboard
Some in-game text is small and may be hard to read
Default graphics settings perform well on Steam Deck

Multiplayer and co-op

Languages

Text only: English, French, German, Spanish - Spain, Japanese, Korean, Portuguese - Portugal, Russian, Simplified Chinese, Italian, Polish, Portuguese - Brazil, Traditional Chinese, Turkish.