Single-player games like Mainframe Defenders
Below are 18 single-player Steam games similar to Mainframe Defenders, ranked by player overlap. Every pick carries Steam's Single-player category, so multiplayer-only titles or always-online games don't sneak in. imho.run pulls the category data from Steam directly — Single-player here matches what the store labels.
Want the full alternatives list (paid + free + Steam Deck + cheaper picks)? See the parent games like Mainframe Defenders page.
Ranked picks
- 1
Tyrant Tactics: Birth of Revolution
Single-player alternative to Mainframe Defenders — playable solo, no multiplayer required. Shares Strategy and Indie with Mainframe Defenders.
Field your army, deploy mechs, and battle with up to 4 players in Tyrant Tactics: Birth of Revolution! Control 1 of 4 unique factions and lead them to victory in turn-based combat through a narrative focused campaign and multiplayer modes featuring both local and online play.
- 2
GearHead Caramel
Single-player alternative to Mainframe Defenders — playable solo, no multiplayer required. Shares Strategy and Indie with Mainframe Defenders.
A turn based tactics style Roguelike mecha RPG set in a world recovering from the apocalypse. Take control of an 18m, 50 ton death machine and build a team of unique lancemates. Features include a detailed mecha design system, procedural narrative, and both mecha + personal scale combat.
- 3
Jupiter Moons: Mecha🦾
Single-player alternative to Mainframe Defenders — playable solo, no multiplayer required. Shares Strategy and Indie with Mainframe Defenders.
Choose your mech, customize your loadout, and build your perfect deck. Experiment with cards to find powerful combinations as you enjoy the tactical combat and deckbuilding in this roguelike adventure!
- 4
Cyber Knights: Flashpoint
Single-player alternative to Mainframe Defenders — playable solo, no multiplayer required. Shares Strategy and Indie with Mainframe Defenders.
Cyberpunk mercenaries RPG! Turn-based squad tactics with unique heist-planning strategy. Build your crew wisely; their stories will become interwoven with your own. Pull off heists with powerful cyberware, faction connections, multiclassing, weapon modding, stealth, hacking, and more!
- 5
Chaos Front
Single-player alternative to Mainframe Defenders — playable solo, no multiplayer required. Shares Strategy and Indie with Mainframe Defenders.
A turn-based space mecha mercenary game. You can recruit pilots and captains with varying stories and skills, buy and modify spaceships, mecha, artillery, and fighters, take missions, participate in battles between Galactic Powers, change the situations, and experience different stories.
- 6
Rogue Waters
Single-player alternative to Mainframe Defenders — playable solo, no multiplayer required. Shares Strategy and RPG with Mainframe Defenders.
Rogue Waters is a Pirate Tactical Turn-Based Rogue-lite. Play as Captain Cutter, commanding your ship and crew through procedurally generated encounters to seek revenge. Recruit, train, and upgrade crew, use powerful sea creatures, and engage in dynamic naval and melee combat to gain the upper hand.
- 7
Tyrant's Blessing
Single-player alternative to Mainframe Defenders — playable solo, no multiplayer required. Shares Strategy and Indie with Mainframe Defenders.
Tyberia has been turned into a paradise by the Tyrant, free from war, suffering, and death - because nearly everyone has been turned into the undead. Take charge of the last living warriors in tactical, turn-based battles and drive the Dead Army into the sea!
- 8
Into the Breach
Single-player alternative to Mainframe Defenders — playable solo, no multiplayer required. Shares Strategy and Indie with Mainframe Defenders.
Control powerful mechs from the future to defeat an alien threat. Each attempt to save the world presents a new randomly generated challenge in this turn-based strategy game.
- 9
STAR WARS™: Rebel Assault I + II
Single-player alternative to Mainframe Defenders — playable solo, no multiplayer required.
ake your T16 through Beggar's Canyon...Then dodge asteroids and blast TIE fighters in a deep space rumble... tackle a fleet of menacing AT-ATs on the icy tundra of Hoth...and ultimately annihilate Vader and the evil Empire with a kamikaze trench run on the infamous Death Star.
- 10
XCOM® 2
Single-player alternative to Mainframe Defenders — playable solo, no multiplayer required. Shares Strategy with Mainframe Defenders.
XCOM 2 is the sequel to XCOM: Enemy Unknown, the 2012 award-winning strategy game of the year. Earth has changed and is now under alien rule. Facing impossible odds you must rebuild XCOM, and ignite a global resistance to reclaim our world and save humanity.
- 11
The Bureau: XCOM Declassified
Single-player alternative to Mainframe Defenders — playable solo, no multiplayer required.
The year is 1962 and the Cold War has the nation gripped by fear. A top-secret government unit called The Bureau begins investigating a series of mysterious attacks by an enemy more powerful than communism.
- 12
Cogmind
Single-player alternative to Mainframe Defenders — playable solo, no multiplayer required. Shares Strategy and Indie with Mainframe Defenders.
Cogmind is a sci-fi roguelike epic in which you play a robot building yourself from components found or salvaged from other robots. Explore a living, breathing world through turn-based tactical combat, or sneak, hack, and fly your way to victory.
- 13
NetHack: Legacy
Single-player alternative to Mainframe Defenders — playable solo, no multiplayer required. Shares Indie and RPG with Mainframe Defenders.
NETHACK: LEGACY is a remastered version of the original NetHack, the deeply rich and complex fantasy D&D roguelike. Hack and slash your way through orcs, dragons, and cockatrices as you explore the perilous procedurally-generated dungeons seeking the Amulet of Yendor.
- 14
UFO ENEMY KNOWN
Single-player alternative to Mainframe Defenders — playable solo, no multiplayer required. Shares Indie with Mainframe Defenders.
Help aliens invade Earth in this procedurally-generated, infinite, 3D shooter game. Fully destructible cityscapes and a wide variety of destruction-wreaking weapons. Visit (rampage and destroy) cities of future Earth and Mars block by block. Chaotic battle scenes as rubble and vehicles pile up.
- 15
Slice&Dice
Single-player alternative to Mainframe Defenders — playable solo, no multiplayer required. Shares Indie with Mainframe Defenders.
Slice & Dice is a puzzle game where the objective is to place the die in the goal frame. Using realistic physics, the player can move the die by affecting the cubes within the environment through a variety of actions like slicing and destroying them. It’s a party game that players and viewers alike can enjoy!
- 16
Lords of Ravage
Single-player alternative to Mainframe Defenders — playable solo, no multiplayer required. Shares Strategy and Indie with Mainframe Defenders.
Become the Final Boss! Play any way you want, combine followers from different factions, and win spectacular turn-based battles. Expand your Empire of Darkness and seek a powerful artifact that can change the fate of the world.
- 17
The Bunker Notes - Horror/Drama Visual Novel
Single-player alternative to Mainframe Defenders — playable solo, no multiplayer required. Shares Indie with Mainframe Defenders.
"The Bunker Notes" is a visual novel about a concrete trap where the past whispers through the cracks of rusted doors. In this world, survival is everything; meeting another person might be your last mistake.
- 18
Lords of Ravage: Dread Knights
Single-player alternative to Mainframe Defenders — playable solo, no multiplayer required. Shares Strategy and RPG with Mainframe Defenders.
Free version of a tactical RPG with roguelike elements. Become one of the Lords of Ravage and choose a playstyle that fits you. Combine followers from different factions and raze kingdoms in search of an artifact that can shape the world.