Single-player games like Idle Protocol
Below are 8 single-player Steam games similar to Idle 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 Idle Protocol page.
Ranked picks
- 1
Booster Pack Heroes
Single-player alternative to Idle Protocol — playable solo, no multiplayer required. Shares Strategy and Casual with Idle Protocol.
A short incremental game about opening booster packs and surviving monster hordes. Discover rare heroes, upgrade their power, cast powerful spells and climb through ever harder chapters.
- 2
Bottom Squad
Single-player alternative to Idle Protocol — playable solo, no multiplayer required. Shares Indie and Casual with Idle Protocol.
An idle defense game at the bottom of your screen. Build your squad, upgrade your base, and hold the line against relentless alien waves while you work or browse.
- 3
Emojis vs Zombies
Single-player alternative to Idle Protocol — playable solo, no multiplayer required. Shares Strategy and Indie with Idle Protocol.
Emojis vs Zombies is an Idle Desktop Companion Zombie Defense Game! Open packs, Collect Emoji Defenders, Upgrade your squad or base and survive endless waves even while you're AFK or working!
- 4
Last Watchtower
Single-player alternative to Idle Protocol — playable solo, no multiplayer required. Shares Strategy and Indie with Idle Protocol.
Last Watchtower is a short incremental defense game. Gather resources, pick upgrades, and unlock powerful tower abilities. Experiment with diverse builds, withstand relentless monster waves, and grow stronger with every run through permanent meta-progression.
- 5
ShredDead
Single-player alternative to Idle Protocol — playable solo, no multiplayer required. Shares Strategy and Indie with Idle Protocol.
ShredDead is a quirky relaxing incremental zombie-shredding game focused on progression with no fail states. Defeat endless waves, collect loot, grow your skill tree and evolve the zombies.
- 6
Very Very RARE
Single-player alternative to Idle Protocol — playable solo, no multiplayer required. Shares Strategy and Indie with Idle Protocol.
Forge insanely rare turrets in an incremental idle tower defense. Hunt impossible loot, unlock powerful relics, expand your skill tree, complete quests, and discover game-breaking synergies as you chase the rarest drops imaginable.
- 7
Miracle Brave: Beast Defense Line
Single-player alternative to Idle Protocol — playable solo, no multiplayer required. Shares Strategy and Indie with Idle Protocol.
Endless tides of beasts crash against your fortress, yet never breach your line. Fight alongside your brave companions, reap the invaders, and grow stronger with every battle. Rise to meet the next wave with greater might—reap, strengthen, reap again. The cycle never ends.
- 8
Skull Rainbow
Single-player alternative to Idle Protocol — playable solo, no multiplayer required. Shares Strategy and Indie with Idle Protocol.
Skull Rainbow is a colorful Clicker and Idle Game. Use the 8 Elements to create your Skull Army.