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
Purrvivors
Single-player alternative to Invasion Protocol — playable solo, no multiplayer required. Shares Action and Casual with Invasion Protocol.
The catapoclypse is upon us. Lead battle-hardened cats against endless swarms of vermin — auto-fire your weapons, scoop kibble between waves, and stack 32 weapons + 30 items into gloriously broken builds. Solo or 4-player local co-op. Survive… or meOWWW.
- 2
Chrome Survivor
Single-player alternative to Invasion Protocol — playable solo, no multiplayer required. Shares Action and Early Access with Invasion Protocol.
In this bullet heaven roguelite combine weapons into powerful evolutions, collect items to enhance your runs, equip and craft powerful cybernetic augments that change the way you play. Can you complete a 9 modded nightmare difficulty run and become John Cyberpunk?
- 3
Geometry Rift: Apocalypse
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.
- 4
Mutant Tide
Single-player alternative to Invasion Protocol — playable solo, no multiplayer required. Shares Action and Casual with Invasion Protocol.
The tide came in and it brought monsters. Carve through relentless swarms of deep sea horrors, forge 20 weapons into over 90 monstrous evolutions, and drag 10 mutated survivors back from the abyss alone or in co-op. A horde survival roguelite where the ocean wants you dead.
- 5
One More Depth
Single-player alternative to Invasion Protocol — playable solo, no multiplayer required. Shares Action and Early Access with Invasion Protocol.
A fast-paced, 4-player co-op action RPG. As an orphan, dive into twisted realms to retrieve the legendary "Precious." Don't let the cute art fool you—lethal threats await in the abyss. Dual-Class Builds: Mix and match classes with diverse loot to craft thousands of unique combat styles.
- 6
The Last Scribe
Single-player alternative to Invasion Protocol — playable solo, no multiplayer required. Shares Action with Invasion Protocol.
A roguelite action game where you write your own spells in a magical language. Venture into stories inspired by the great classics of literature, master the power of glyphs, and save these tales before they vanish forever.
- 7
Null Core
Single-player alternative to Invasion Protocol — playable solo, no multiplayer required. Shares Action with Invasion Protocol.
Null Core is stylized action rogue-lite bullet-hell dungeon crawler that can be played solo or co-op where you play as legendary tank heroes fighting in a rebellion against an evil empire.
- 8
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.
- 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.