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
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 fallen 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.
- 2
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.
- 3
Horde Sweepers
Single-player alternative to Contagion Protocol — playable solo, no multiplayer required. Shares Action and Indie with Contagion Protocol.
Fast-paced Rogue-lite action. A high-octane mashup of Vampire Survivors and Hades. Unlock and combine upgrades, create your unique builds, use active abilities, enhance your weapons, find enemy weaknesses, and cleanse this city of mutants.
- 4
Arms of God
Single-player alternative to Contagion Protocol — playable solo, no multiplayer required. Shares Action and Indie with Contagion Protocol.
Gear up for a battle through hell in this roguelite Bullet Heaven Arena Autoshooter with Doom-inspired gore vibes, metal music, and a satisfying combat feel. Wield five weapons at once, upgrade and merge them to forge indestructible builds, and bring divine justice to a world on the brink of chaos.
- 5
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?
- 6
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.
- 7
Disaster Plan Z
Single-player alternative to Contagion Protocol — playable solo, no multiplayer required. Shares Action and Indie with Contagion Protocol.
Disaster Plan Z is a hardcore single-player shooting survival game set in a post-apocalyptic world. Players need to utilize various weapons along with their unique skills, construct different buildings, and continuously upgrade to resist the invasion of countless zombies and mutant creatures.
- 8
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.