Top similar games like M.A.S.S. Builder:

Pilot your fully customizable Arsenal mech and join your fellow mercenaries in defending humanity from the corrupted machines and gigantic robots in this post-apocalyptic action game!

This is a single-player action game playable in both first-person and third-person perspectives. Players can choose to pilot a combat mech armed with guns and blades, slashing through disgusting cockroaches in post-apocalyptic ruins to eliminate regional threats.

Cyber Heart is a single-player, story-driven mech shooter where you, a commander, ride your customizable mech through an open world to fight against enemy AI machines.

This game is a sci-fi action role-playing game From assembly to painting, you can greatly customize your character

Nimbus INFINITY is a high-speed mech action game, set in the future of a war-torn Earth that has just begun to heal. Equip mechanical Battle Frames with weapons to customize your battle style, and soar through variant battlefields while discovering the story of a new generation.

Mechanic Action MMOTPS Project Rayssus Customize your own Rayssus and use your Weapons, actions, and skills to be active on the battlefield.

A fast-paced TPS & FPS where you control a mech in battle. Customize 12 parts: head, torso, arms, legs, booster, FCS, and 6 weapons. Weapon and frame colors are changeable. Use weapons, jump, boost up, run on walls, do rapid boosts, quick turns, and high boosts.

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!

Kanka is a sci-fi multiplayer Action RPG! Team up with your 'Kankas' (buddies) for intense Third-Person Shooter combat in a universe waiting to be explored. Early development - join our journey!

Skylorn: Bound Together is a co-op open-world action RPG. You arrived from a distant colony and explore a post-apocalyptic sci-fi fantasy world, battle enemies, uncover mysteries—alone or with up to two friends. Expect roughly 5 action filled hours for a single playthrough.

Robots Arena Fight: SYSTEM ONLINE. Engage in metallic mayhem. Deploy BULL. Deploy WASP. Lasers, rockets, chaos. Target locked. Smash, blast, dominate. No rules—only steel, fire, and victory. Mission accepted. Combat initiated.

This is an action game in which the player builds and controls a giant robot. The game features ground crawling 3D maneuvers, customizable elements, picturesque characters, and scenarios. Even those who have never been good at action games will surely find that Vulture will respond to their needs.

Gear up for tactical mech action in War Robots: Frontiers, a free-to-play multiplayer mech shooter. Construct and customize, squad up with Pilots online, and fire up your engines in massive intergalactic battles.

A tense 20-minute battle, using firearms and skills to eliminate enemies. Upgrade and select MODs to enhance yourself, complete various battlefield missions to learn skills, and obtain weapon materials. Maintain rapid growth in abilities to survive in the game.

Faster than anyone. Stronger than anyone. And more stunning. Customize your robot for “cyber battle racing” in a game that offers all the thrills of racing, battle, and customization. Online, Offline, Time-Attack... which mode will you dominate?!

Break Free is a fast paced third person sci fi shooter game. The creatures that live among us have made the Earth uninhabitable for human life. You are mankind's best hope for survival. Make no mistake, war is coming and you shall die today, then you shall live to fight again tomorrow.

Become a future AI and delve into 3D bullet hell action in an advanced lab. Combine various modules, repeat combat training, enhance stats with research points, and earn achievements to develop your unique combat style. Enjoy overcoming waves of enemies and defeating bosses within time limits.

Dolls Nest is a 3D action game where you can customize mecha girls and explore a ruined world. As a Frame Unit, your adventure will pit you against the gigantic autonomous factory world of Hod. Overcome obstacles using the parts at your disposal and uncover the mysteries that lie at its center.

"AfterM.A.T.H. (Mobile Arsenal Tactical Hunter)" is a sci-fi action game where players pilot advanced mechs to combat the deadly Venomarch creatures. Engage in diverse missions including enemy elimination, hive destruction, new weapon testing, and giant boss battles in a post-apocalyptic world.

Enter the abyss of RPGs. There’s nothing else like it—anywhere. That’s a promise. At first you’ll wonder, “What is this?” Keep going. You might recall a few familiar titles. And then it hits you: this is unlike any RPG you’ve ever played. The abyss of RPGs awaits.

Fast-paced mecha themed third person shooter.

EMPYREAN//YOU is a third-person mecha metroidvania with dynamic, agile combat and a unique lo-fi vector aesthetic. Fight angels, use their ichor to customize your mech, and explore an empty world damned by a true and benevolent God.

Set in futuristic Tokyo, take control of the robotic community before they control everything!

或许在某个时空里他已经战败了 但是在这里或许可以改写一切，传说最强的赏金猎人！ 那段未完的故事 将如何开始又如何结束...

Cyber Loop is a TPS roguelike shooter where you play as Alice, an enforcement robot suppressing a robot uprising in Sodom. Choose from 60+ weapons, face random monster combinations, and challenge epic bosses. Experience the thrilling heartbeat of machinery! Add to your Steam wishlist now.

EXTERMINATOR is a fast-paced, high-octane action third-person shooter inspired by Armored Core and Vanquish. Destroy hard bosses, obtain their armaments, modify armaments, annihilate hordes of robots, solve puzzles, learn new skills, try different builds, and customize your robot.

MechNest is a 3D bullet hell shooter developed by a single person. As you progress through the map, which changes with each challenge, collect reinforcement items and defeat powerful enemies with flashy shooting! Combine your skills freely and rampage through the hive of mechs!

As an OpsRunner you get emulated into dangerous Scertanic City to complete missions and find out the truth about your identity. When not on a mission you can try Hash Bash, a 1v1 mode where you progress through the leagues of different opponents.

In a distant future where human civilization has crumbled, Earth has become a pristine new world teeming with life. In this open-world ARPG, play as the the courageous Hailey and set out on a journey filled with mystery and adventure. Begin your own fantastical journey as you chase the unknown.

Full Gear Mong Kok is a sci-fi hack and slash game with smooth combat that tells the story of a rebellious girl fights back against the alien stronghold!

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!