Single-player games like Invasion Protocol
Below are 16 single-player Steam games similar to Invasion Protocol, 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 Invasion Protocol page.
Ranked picks
- 1
Geometry Rift
Single-player alternative to Invasion Protocol — playable solo, no multiplayer required. Shares Action with Invasion Protocol.
Imagine the frenetic chaos of Geometry Wars colliding with the addictive progression of Vampire Survivors. That's Geometry Rift — a relentless auto-fire action experience where geometric enemies flood the screen and your only option is to shoot, dodge, and survive.
- 2
Null Core
Single-player alternative to Invasion Protocol — playable solo, no multiplayer required. Shares Action with Invasion Protocol.
Null Core is bullet-hell action roguelite where you play as powerful tanks. Wield the shells of fallen legends, combine them with new technologies to clear dungeons solo or in co-op fighting against Zeroth's forces.
- 3
DRAGUN
Single-player alternative to Invasion Protocol — playable solo, no multiplayer required. Shares Action with Invasion Protocol.
Run-and-gun roguelike about shooting through an army of dragons and their shadowy organization with an array of weapons, upgrades, and characters in randomized stage layouts.
- 4
Crazy Fruit Shooter
Single-player alternative to Invasion Protocol — playable solo, no multiplayer required. Shares Action with Invasion Protocol.
One day you wake up and find yourself turned into a Fruitman? Face the endless waves of vegetables chasing you, grab your gun, and blast them away!
- 5
Blazing Beaks
Single-player alternative to Invasion Protocol — playable solo, no multiplayer required. Shares Action with Invasion Protocol.
Roguelite - where too much greediness can be fatal. A colorful world with armed birds blazing their way through piles of mutants, monsters and creepy creatures. Lots of mysteries to unravel, secrets to discover and levels to explore.
- 6
Assault Android Cactus+
Single-player alternative to Invasion Protocol — playable solo, no multiplayer required. Shares Action with Invasion Protocol.
Assault Android Cactus is an intense arcade style twin stick shooter - pick from one of nine unique synthetic heroines and blast your way through overwhelming robots hordes to save the ship from its own workforce. Supports single player and local co-op game modes.
- 7
Genome Guardian 2
Single-player alternative to Invasion Protocol — playable solo, no multiplayer required. Shares Action and Casual with Invasion Protocol.
COMBINE WEAPONS in the microscopic shooter with macroscopic depth. BUILD YOUR NANOBOT from hundreds of parts. SURVIVE the microbial onslaught once more in this psychedelic dive to the Abyss, full of mutations, minerals, anomalies and powerup polyps. SHMUP mode turns it into a vertical shoot 'em up!
- 8
Mega City Force
Single-player alternative to Invasion Protocol — playable solo, no multiplayer required. Shares Action with Invasion Protocol.
Retrowave Action Roguelike featuring tough agents battling crime to the electrifying music of artists like Droid Bishop, Timecop1983, and more! Choose your agent and dive into hardcore action against enemies and bosses, utilizing a vast arsenal and special abilities that will define your playstyle
- 9
Z Dawn
Single-player alternative to Invasion Protocol — playable solo, no multiplayer required.
Z Dawn is a survival RPG that takes place in a post-apocalyptic world in which you get to manage a group of survivors to fight for their life, level up their skills, help fight off different breeds of zombies, build and upgrade camp, face hundreds of thrilling events and much more!
- 10
Expect The Unexpected
Single-player alternative to Invasion Protocol — playable solo, no multiplayer required. Shares Casual with Invasion Protocol.
Expect The Unexpected is a roguelike, fast-paced, turn-based game with RPG elements. Interact with random generated maps in which you have to deal with hundreds of different events and situations. What will you be? What will you become?
- 11
Dungeons of Hell
Single-player alternative to Invasion Protocol — playable solo, no multiplayer required. Shares Casual with Invasion Protocol.
Enter the dungeons of hell, face many different demons in a tactical challenge. You play as a lone hero against hordes of demons, clear the dungeons to get more equipment and experience to unlock new and powerful abilities.
- 12
Paths & Danger
Single-player alternative to Invasion Protocol — playable solo, no multiplayer required.
Embark on an enchanting journey to Paths & Danger, a masterfully crafted procedural turn-based RPG that seamlessly blends simplicity with tactical brilliance. Get ready to be captivated as you assemble a formidable fellowship, where the art of teamwork takes center stage.
- 13
Mutant Meltdown
Single-player alternative to Invasion Protocol — playable solo, no multiplayer required.
Mutant Meltdown is a survival RPG that takes place in a post-apocalyptic world in which you get to manage a group of survivors to fight for their life, level up their skills, help fight off different breeds of mutants, build and upgrade your camp, face hordes of mutants and much more!
- 14
Jurassic Clans
Single-player alternative to Invasion Protocol — playable solo, no multiplayer required.
Jurassic Clans sets in a world where dinosaurs co-exist with humans. Ensure your people thrive in this dangerous world by surviving and evolving your tribe. Search for resources to expand your village, research technologies, defend your people from predators and prepare for the upcoming apocalypse.
- 15
Commander: Modern War
Single-player alternative to Invasion Protocol — playable solo, no multiplayer required.
Experience the thrill of a modern conflict between two factions, as you outsmart your opponents in an epic game of strategy and cunning. Take command of your ground, air, and naval units and lead them to victory in the most immersive turn-based battle simulation. The battlefield awaits.
- 16
Interstellar Conquest
Single-player alternative to Invasion Protocol — playable solo, no multiplayer required.
Take planets and assemble your fleet. The conquest of space is now, navigate through asteroid fields and hide in nebulas to outsmart your opponents. Experience the challenge of ion storms disrupting your ship's sensors and become the ultimate space fleet commander.