Games like M.A.S.S. Builder
If M.A.S.S. Builder is your kind of game, the closest matches are GUNDAM BREAKER 4, SD GUNDAM BATTLE ALLIANCE and BREAKPOINT: Viper Squad — picked from the ranked list below. Each pick is ranked by what players of this game also play, shared genres and tags, and review-mined similarity — not a generic popularity list.
Get personalized picks →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.
About M.A.S.S. Builder: Commander, customize and build your Mechanical Assault Skeleton Suit (M.A.S.S.) and lead the fight against an alien invasion bent on exterminating the human race. The fate of humanity is in your hands.
Players who liked M.A.S.S. Builder also play
Steam players who put hours into M.A.S.S. Builder also tend to own these titles — a signal called collaborative filtering. imho.run cross-references millions of library ownership patterns to surface games whose real audiences overlap, regardless of whether their genre tags match.
GUNDAM BREAKER 4
WHY THIS
Top pick for M.A.S.S. Builder fans by collaborative filtering across millions of Steam libraries. Shares Action and RPG with M.A.S.S. Builder.
Create your own ultimate Gundam in the newest Gundam Breaker! With more customizable parts than ever before, you finally have the freedom to build your perfect Gunpla. Test it in battle using the brand new dual-weapon system and break parts off of your enemies and add them to your collection.
SD GUNDAM BATTLE ALLIANCE
WHY THIS
Second-strongest match for M.A.S.S. Builder fans by collaborative filtering across millions of Steam libraries. Shares Action and RPG with M.A.S.S. Builder.
SD Gundam Battle Alliance is a multiplayer Gundam action RPG where you can smash foes solo or with friends in thrilling mechanized combat. Acquire new mobile suits, power them up, and take them into battle in various missions!
BREAKPOINT: Viper Squad
WHY THIS
Third-strongest match for M.A.S.S. Builder fans by collaborative filtering across millions of Steam libraries. Shares Action and Strategy with M.A.S.S. Builder.
A high-velocity sci-fi shooter built around charge management, explosive team fights, and Drivers who flip the match with their abilities.
MOBILE SUIT GUNDAM SEED BATTLE DESTINY REMASTERED
WHY THIS
Ranked #4 for M.A.S.S. Builder fans by collaborative filtering across millions of Steam libraries. Shares Action and RPG with M.A.S.S. Builder.
Become a pilot in the world of Mobile Suit Gundam SEED, for the first time available with English localization! Engage in thrilling, action-packed Gundam battles, complete missions, and tune up your newly acquired Mobile Suits!
Daemon X Machina: Titanic Scion
WHY THIS
Ranked #5 for M.A.S.S. Builder fans by collaborative filtering across millions of Steam libraries. Shares Action with M.A.S.S. Builder.
Feel the exhilaration of fast-paced combat in your fully customized armored suit as you freely explore a deadly and dangerous world on land or in the air. Take on titanic boss battles with alone or with up to two other friends in online co-op!
MEGATON MUSASHI W: WIRED
WHY THIS
Ranked #6 for M.A.S.S. Builder fans by collaborative filtering across millions of Steam libraries. Shares Action and RPG with M.A.S.S. Builder.
Launch a counteroffensive to take back the Earth from alien invaders in this mecha action RPG.
Vanquish
WHY THIS
Ranked #7 for M.A.S.S. Builder fans by collaborative filtering across millions of Steam libraries. Shares Action with M.A.S.S. Builder.
PlatinumGames’ revolutionary sci-fi action shooter slide-boosts onto PC. Battle legions of future-tech enemies using a vast arsenal of weapons, including all DLC. Fully unlocked framerate and gorgeous HD resolutions up to 4K. The definitive way to play: war has accelerated.
Vox Machinae
WHY THIS
Ranked #8 for M.A.S.S. Builder fans by collaborative filtering across millions of Steam libraries. Shares Action and Indie with M.A.S.S. Builder.
Strap yourself into the cockpit of a robot seven times taller than a Tyrannosaurus Rex and prepare to do battle in Vox Machinae: the ultimate giant robot combat action-simulator for both VR and standard screens.
Cheaper alternatives
Games in the same vein priced at least 40% below M.A.S.S. Builder at current Steam store prices.
Garry's Mod
WHY THIS
Priced ~80% under M.A.S.S. Builder on Steam right now. Shares Indie with M.A.S.S. Builder.
Garry's Mod is a physics sandbox. There aren't any predefined aims or goals. We give you the tools and leave you to play.
Lethal Company
WHY THIS
Priced ~60% under M.A.S.S. Builder on Steam right now. Shares Action and Indie with M.A.S.S. Builder.
A co-op horror about scavenging at abandoned moons to sell scrap to the Company.
Left 4 Dead 2
WHY THIS
Priced ~60% under M.A.S.S. Builder on Steam right now. Shares Action with M.A.S.S. Builder.
Set in the zombie apocalypse, Left 4 Dead 2 is a co-operative action horror FPS takes you and your friends through the cities, swamps and cemeteries of the Deep South, from Savannah to New Orleans across five expansive campaigns.
Bloons TD 6
WHY THIS
Priced ~44% under M.A.S.S. Builder on Steam right now. Shares Strategy with M.A.S.S. Builder.
The Bloons are back and better than ever! Get ready for a massive 3D tower defense game designed to give you hours and hours of the best strategy gaming available.
People Playground
WHY THIS
Priced ~60% under M.A.S.S. Builder on Steam right now. Shares Action and Indie with M.A.S.S. Builder.
Shoot, stab, burn, poison, tear, vaporise, or crush ragdolls in a large open space.
Fallout: New Vegas
WHY THIS
Priced ~60% under M.A.S.S. Builder on Steam right now. Shares Action and RPG with M.A.S.S. Builder.
Welcome to Vegas. New Vegas. Enjoy your stay!
Free alternatives
Free-to-play games that recommended players of this title also tend to enjoy.
Life is Strange - Episode 1
WHY THIS
Free-to-play pick from the same recommendation pool — no purchase to try it. Shares Action with M.A.S.S. Builder.
Episode 1 now FREE! Life is Strange is an award-winning and critically acclaimed episodic adventure game that allows the player to rewind time and affect the past, present and future.
Ultimate Custom Night
WHY THIS
Free-to-play pick from the same recommendation pool — no purchase to try it. Shares Action and Indie with M.A.S.S. Builder.
Welcome to the ultimate FNAF mashup, featuring 50 selectable characters and custom difficulties!
Bongo Cat
WHY THIS
Free-to-play pick from the same recommendation pool — no purchase to try it. Shares Indie with M.A.S.S. Builder.
Bongo cat needs your help. Bongo cat needz more hatz!!! Every time you press a key, Bongo cat will punch your taskbar. Type, click, play, work to collect more points. Which hats will you find?
Indigo Park: Chapter 1
WHY THIS
Free-to-play pick from the same recommendation pool — no purchase to try it. Shares Action and Indie with M.A.S.S. Builder.
Explore the abandoned childhood wonder of Indigo Park! Guided by Rambley the Raccoon, help restore power to the destroyed amusement park while you run from the reason it shut down.
STRAFTAT
WHY THIS
Free-to-play pick from the same recommendation pool — no purchase to try it. Shares Action with M.A.S.S. Builder.
STRAFTAT is a 1v1/2v2 ONLINE first person SHOOTER with quick rounds in over 350 MAPS ; Including all WEAPONS, proximity chat and 4 players FFA.
Counter-Strike:Global Offensive
WHY THIS
Free-to-play pick from the same recommendation pool — no purchase to try it. Shares Action with M.A.S.S. Builder.
Counter-Strike:Global Offensive (CS:GO) expands upon the team-based action gameplay that it pioneered when it was launched over 2 decades ago. CS:GO features new maps, characters, weapons, and game modes, and delivers updated versions of the classic CS content (de_dust2, etc.).
The Expendabros
WHY THIS
Free-to-play pick from the same recommendation pool — no purchase to try it. Shares Action and Indie with M.A.S.S. Builder.
The Expendabros have assembled and set their sights on the forces of ruthless arms dealer Conrad Stonebanks in the forests of Eastern Europe.
Narrow it down
Head-to-head comparisons
Frequently asked about M.A.S.S. Builder
- Does M.A.S.S. Builder run on Steam Deck?
- M.A.S.S. Builder is rated Playable on Steam Deck — it runs, but expect some manual adjustments (control remapping, text size, or graphics settings) for the best experience.
- How much does M.A.S.S. Builder cost?
- M.A.S.S. Builder is listed on Steam at 24.99 USD (current store price; Steam sales may reduce this temporarily).
- Does M.A.S.S. Builder have multiplayer or co-op?
- Yes — M.A.S.S. Builder supports multi-player play according to its Steam store listing (Multi-player, Online Co-op, Co-op).
- What games are most similar to M.A.S.S. Builder?
- Based on Steam play patterns and shared genres/tags, the games most often recommended alongside M.A.S.S. Builder are GUNDAM BREAKER 4, SD GUNDAM BATTLE ALLIANCE, BREAKPOINT: Viper Squad.
- Who developed M.A.S.S. Builder?
- M.A.S.S. Builder was developed by Vermillion Digital and published by Sekai Project.
imho.run ranks Steam game alternatives using a mix of collaborative filtering (ALS / iALS / EASE / LightGCN), content scoring over genres, categories, Steam tags, developers, and publishers, plus AI-extracted vibes mined from review text. The page above is generated in seed mode anchored on M.A.S.S. Builder.
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