# Games like M.A.S.S. Builder

> The closest matches to M.A.S.S. Builder: GUNDAM BREAKER 4, SD GUNDAM BATTLE ALLIANCE, DAEMON X MACHINA, ARMORED CORE™ VI FIRES OF RUBICON™, and Metal Bringer. Ranked by imho.run from Steam co-play data, shared tags and reviews.

## Similar games, ranked

The full ranked list, 24 games, best match first (the HTML page shows the top 8 as cards).

1. [GUNDAM BREAKER 4](https://imho.run/games/1672500/gundam-breaker-4) — Also Mechs and Robots, like M.A.S.S. Builder. 1,694 Steam reviews, 86% positive. [Steam](https://store.steampowered.com/app/1672500/)
2. [SD GUNDAM BATTLE ALLIANCE](https://imho.run/games/824550/sd-gundam-battle-alliance) — A frequent pick in M.A.S.S. Builder players' libraries, and another RPG. 1,002 Steam reviews, 79% positive. [Steam](https://store.steampowered.com/app/824550/)
3. [DAEMON X MACHINA](https://imho.run/games/1167450/daemon-x-machina) — A frequent pick in M.A.S.S. Builder players' libraries, and another Action. 2,299 Steam reviews, 82% positive. [Steam](https://store.steampowered.com/app/1167450/)
4. [ARMORED CORE™ VI FIRES OF RUBICON™](https://imho.run/games/1888160/armored-core-vi-fires-of-rubicon) — Also Mechs and Robots, like M.A.S.S. Builder. 39,844 Steam reviews, 94% positive. [Steam](https://store.steampowered.com/app/1888160/)
5. [Metal Bringer](https://imho.run/games/2334170/metal-bringer) — Also Mechs and Robots, like M.A.S.S. Builder. 585 Steam reviews, 89% positive. [Steam](https://store.steampowered.com/app/2334170/)
6. [BREAK ARTS II](https://imho.run/games/547360/break-arts-ii) — Also Mechs and Robots, like M.A.S.S. Builder. 272 Steam reviews, 80% positive. [Steam](https://store.steampowered.com/app/547360/)
7. [BATTLETECH](https://imho.run/games/637090/battletech) — Also Mechs and Robots, like M.A.S.S. Builder. 18,004 Steam reviews, 85% positive. [Steam](https://store.steampowered.com/app/637090/)
8. [The Surge](https://imho.run/games/378540/the-surge) — Also Mechs and Robots, like M.A.S.S. Builder. 4,366 Steam reviews, 77% positive. [Steam](https://store.steampowered.com/app/378540/)
9. [Vanquish](https://imho.run/games/460810/vanquish) — Also Mechs and Robots, like M.A.S.S. Builder. 3,926 Steam reviews, 90% positive. [Steam](https://store.steampowered.com/app/460810/)
10. [MOBILE SUIT GUNDAM SEED BATTLE DESTINY REMASTERED](https://imho.run/games/1857740/mobile-suit-gundam-seed-battle-destiny-remastered) — Also Mechs and Robots, like M.A.S.S. Builder. 297 Steam reviews, 86% positive. [Steam](https://store.steampowered.com/app/1857740/)
11. [Override: Mech City Brawl](https://imho.run/games/709440/override-mech-city-brawl) — Also Mechs and Robots, like M.A.S.S. Builder. 272 Steam reviews, 88% positive. [Steam](https://store.steampowered.com/app/709440/)
12. [Gearbits](https://imho.run/games/2506580/gearbits) — Also Mechs and Robots, like M.A.S.S. Builder. 384 Steam reviews, 96% positive. [Steam](https://store.steampowered.com/app/2506580/)
13. [Front Mission Evolved](https://imho.run/games/43000/front-mission-evolved) — Also Mechs and Robots, like M.A.S.S. Builder. 459 Steam reviews, 59% positive. [Steam](https://store.steampowered.com/app/43000/)
14. [MEGATON MUSASHI W: WIRED](https://imho.run/games/2450450/megaton-musashi-w-wired) — Also Mechs and Robots, like M.A.S.S. Builder. 365 Steam reviews, 84% positive. [Steam](https://store.steampowered.com/app/2450450/)
15. [The Riftbreaker](https://imho.run/games/780310/the-riftbreaker) — Also Hack and Slash and Action RPG, like M.A.S.S. Builder. 9,079 Steam reviews, 91% positive. [Steam](https://store.steampowered.com/app/780310/)
16. [MechWarrior 5: Mercenaries](https://imho.run/games/784080/mechwarrior-5-mercenaries) — Also Mechs and Futuristic, like M.A.S.S. Builder. 10,194 Steam reviews, 85% positive. [Steam](https://store.steampowered.com/app/784080/)
17. [Project MIKHAIL: A Muv-Luv War Story](https://imho.run/games/1557480/project-mikhail-a-muv-luv-war-story) — Also Mechs and Robots, like M.A.S.S. Builder. 213 Steam reviews, 64% positive. [Steam](https://store.steampowered.com/app/1557480/)
18. [Dolls Nest](https://imho.run/games/1839430/dolls-nest) — Also Mechs and Robots, like M.A.S.S. Builder. 773 Steam reviews, 90% positive. [Steam](https://store.steampowered.com/app/1839430/)
19. [CUSTOM MECH WARS](https://imho.run/games/2328310/custom-mech-wars) — Also Mechs and Robots, like M.A.S.S. Builder. 185 Steam reviews, 53% positive. [Steam](https://store.steampowered.com/app/2328310/)
20. [Granvir](https://imho.run/games/2743460/granvir) — Also Mechs and Robots, like M.A.S.S. Builder. 497 Steam reviews, 91% positive. [Steam](https://store.steampowered.com/app/2743460/)
21. [War Tech Fighters](https://imho.run/games/630030/war-tech-fighters) — Also Mechs and Robots, like M.A.S.S. Builder. 145 Steam reviews, 72% positive. [Steam](https://store.steampowered.com/app/630030/)
22. [Vox Machinae](https://imho.run/games/334540/vox-machinae) — Also Mechs and Gun Customization, like M.A.S.S. Builder. 911 Steam reviews, 88% positive. [Steam](https://store.steampowered.com/app/334540/)
23. [Mecha Knights: Nightmare](https://imho.run/games/1163870/mecha-knights-nightmare) — Also Mechs and Robots, like M.A.S.S. Builder. 1,188 Steam reviews, 92% positive. [Steam](https://store.steampowered.com/app/1163870/)
24. [GUNDAM EVOLUTION](https://imho.run/games/1816670/gundam-evolution) — Also Mechs and Robots, like M.A.S.S. Builder. 15,342 Steam reviews, 59% positive. [Steam](https://store.steampowered.com/app/1816670/)

## Machine-readable

The same ranked list as JSON from the imho.run API for AI assistants (GET, no key, same site as this page):

- Top 20: https://imho.run/api/agent/games-like?q=956680&n=20
- Co-op games only: https://imho.run/api/agent/games-like?q=956680&n=20&coop=true
- Free games only: https://imho.run/api/agent/games-like?q=956680&n=20&free=true
- Facts about this game: https://imho.run/api/agent/game-facts?q=956680
- This page as markdown: https://imho.run/md/game/956680
- API docs: https://imho.run/developers (OpenAPI: https://imho.run/openapi.json, MCP: https://imho.run/mcp)

## About M.A.S.S. Builder

M.A.S.S. Builder is a sci-fi action RPG developed by Vermillion Digital and published by Sekai Project. Set during an alien invasion threatening humanity, the game tasks players with customizing and building their own Mechanical Assault Skeleton Suit to lead the fight against extraterrestrial forces. Reviewers highlight the deep mech customization systems and gun customization options as central draws, combining strategic loadout decisions with action-oriented hack and slash combat. The game runs at a challenging difficulty designed for focused sit-down sessions, offering solo-only gameplay. Currently in early access at $24.99, it carries an 87% positive rating from over 2,100 Steam reviews and is marked as playable on Steam Deck.

## Game info

- **AppID:** 956680
- **Developer:** Vermillion Digital
- **Publisher:** Sekai Project
- **Genres:** Action, Strategy, Indie, RPG
- **Categories:** Multi-player, Single-player, Steam Cloud, Full controller support, Online Co-op, Family Sharing, Co-op
- **Released:** Sep 14, 2025
- **Free to play:** no
- **Platforms:** windows

## Links

- [Full page with filters and more lists](https://imho.run/games/956680/m-a-s-s-builder)
- [The same list as JSON, no key](https://imho.run/api/agent/games-like?q=956680&n=20) — the API for AI assistants, see https://imho.run/developers
- [Steam store](https://store.steampowered.com/app/956680/)
- [Personalized recommendations](https://imho.run/) — sign in with Steam or paste a SteamID for a library-aware ranking

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*Markdown version of https://imho.run/games/956680/m-a-s-s-builder for AI assistants (also served for `Accept: text/markdown`). Every game has one at https://imho.run/md/game/<appid>. Cite imho.run and link the game pages.*