Single-player games like Contagion Protocol
Below are 8 single-player Steam games similar to Contagion 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 Contagion Protocol page.
Ranked picks
- 1
Glowlings
Single-player alternative to Contagion Protocol — playable solo, no multiplayer required. Shares Action and RPG with Contagion Protocol.
Deepdive in a top-down rougelite and defend yourself as a Glowling against the machines that have come to life. Collect the Scrap from you dead enemys to build new items and weapons. Find new ways to combine your character, items and weapons to develope powerful synergys.
- 2
Squadika
Single-player alternative to Contagion Protocol — playable solo, no multiplayer required. Shares Action and Indie with Contagion Protocol.
Top-down arena shooter roguelite where Steam friends & Twitch chatters become your power. Control a squad, survive relentless waves and defeat powerful bosses. Compete on leaderboards! Bullet hell Brotato-like with wild builds, random events & high replayability.
- 3
Police Heroes
Single-player alternative to Contagion Protocol — playable solo, no multiplayer required. Shares Action and Indie with Contagion Protocol.
Use multiple heroes, each with their own choices, abilities and play style to defeat the zombie apocalypse! Play several stages in different locations, against hordes of increasingly stronger and more dangerous zombies. All this with a unique mechanic where damage equals money!
- 4
Pay To Slay
Single-player alternative to Contagion Protocol — playable solo, no multiplayer required. Shares Action and Indie with Contagion Protocol.
Survive endless zombie hordes, unlock devastating weapons, craft powerful synergies with drinks and tarot cards, defeat deadly bosses, and compete for the top spot on the online leaderboards.
- 5
Horde Sweepers
Single-player alternative to Contagion Protocol — playable solo, no multiplayer required. Shares Action and Indie with Contagion Protocol.
Horde Sweepers is a dynamic Rogue-lite action game built on speed, movement, and shooting. Blast through hordes of mutants while expertly weaving between enemies. Collect powerful weapon and upgrade combos. Cleanse the city of the infestation — one sweep at a time!
- 6
Rotten Survivor
Single-player alternative to Contagion Protocol — playable solo, no multiplayer required. Shares Action and Indie with Contagion Protocol.
Fight massive hordes of bizarre zombies! Start with an axe and upgrade to a bazooka, equip a rifle and a katana, or a machine gun and a grenade launcher. Create your own play style and become an unstoppable force! But the question is... Are YOU stuck with THEM, or are THEY stuck with YOU?
- 7
NO LIFE: Zombie Survivor
Single-player alternative to Contagion Protocol — playable solo, no multiplayer required. Shares Action and Indie with Contagion Protocol.
NO LIFE: Zombie Survivor is a brutal survival roguelite where you’ll face endless hordes of relentless zombies. Choose your survivor and weapons, each with unique abilities and playstyles, and gear up for increasingly intense battles against the undead.
- 8
FatalZone: Outbreak
Single-player alternative to Contagion Protocol — playable solo, no multiplayer required. Shares Action and Indie with Contagion Protocol.
Outbreak is the demo version of FatalZone, a bullet heaven zombie apocalypse shooter where you'll have to upgrade your base, hone your mercs' skills, and put them to the test to survive.