Mech Builder 3D

A casual model-building game inspired by Gunpla robot kits

Don Pachi · Released Jan 13, 2026

Reviews: Very Positive; 92% of 79
Recent reviews: Not enough recent
Players: 2; daily peak, Oct 28, 2026
Steam Deck: Unsupported
Last update on Steam: 5 months ago; May 15, 2026
Minimum PC: HD 7770; 8 GB RAM · 5 GB disk; Full requirements

What is Mech Builder 3D?

In this single-player 3D game, you assemble, paint, and pose 61 model kits, including mechs, monsters, and armor. An unlockable kitbash mode lets you combine pieces into your own designs.

For you if...

+you enjoy model kits but want to avoid physical cleanup

Not for you if...

−you want to choose your own assembly order

What players say

92% of 79 reviews are positive

Players praise the relaxing building process. A recurring complaint is the lack of cloud saves.

Screenshots and trailer

Mech Builder 3D system requirements

Minimum: HD 7770, 8 GB RAM, 5 GB of disk space.

As published by the developer.

Can my PC run Mech Builder 3D?

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Minimum

OS: Windows 10, Windows 11
Processor: Dual Core 2.66GHz (64 bit)
Graphics: Radeon HD 7770, GeForce GTX 460 or better
Memory: 8 GB RAM
Storage: 5 GB available space
DirectX: Version 11
Notes: Requirements may change as development furthers

Does Mech Builder 3D have co-op or multiplayer?

No: single-player only, no multiplayer modes declared.

Single-player

Does Mech Builder 3D run on Steam Deck?

Unsupported No: Valve rates it Unsupported on Steam Deck.

Not supported on SteamOS

PC version details

DRM: None declared on Steam
Controller: Keyboard and mouse
Platforms: Windows
Achievements: 17
Steam features: Family Sharing
Languages: Full audio: English. Text only: French, Italian, German, Japanese, Simplified Chinese, Spanish - Latin America, Spanish - Spain, Indonesian, Portuguese - Brazil, Portuguese - Portugal, Vietnamese.

Does Mech Builder 3D use AI-generated content?

No AI-generated content is disclosed on the game's Steam page.

Self-reported by the developer under Steam rules: it covers AI content that ships in the game, not tools used to make it. Steam page checked on Oct 27, 2026. How to filter AI games on Steam