Single-player games like Paper Protocol
Below are 8 single-player Steam games similar to Paper 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 Paper Protocol page.
Ranked picks
- 1
Get Off My Space!
Single-player alternative to Paper Protocol — playable solo, no multiplayer required. Shares Strategy and Indie with Paper Protocol.
Get Off My Space! is a tower defense game where you rely on skillful tower placement and resource management to beat upcoming dangers of the galaxy. Combining strategy and micro-managing fire groups, you will overcome the hardest level objectives.
- 2
Doomsday Tower Defense
Single-player alternative to Paper Protocol — playable solo, no multiplayer required. Shares Strategy and Simulation with Paper Protocol.
Challenging tower defense game with 20 levels. Can be completed under 2-3 hours. Kill zombies in a doomsday vibe. Discover your own strategy to beat the horde. No fluff, no story, no BS.
- 3
Roman Conquest: Rise to Power
Single-player alternative to Paper Protocol — playable solo, no multiplayer required. Shares Strategy and Indie with Paper Protocol.
Roman Conquest: Rise to Power is a turn-based strategy game in which the player can feel like a great commander of the Roman Empire. Lead a legion and go with your army to recapture the occupied lands.
- 4
U.F.O. K.O. Tower Defense
Single-player alternative to Paper Protocol — playable solo, no multiplayer required. Shares Strategy and Indie with Paper Protocol.
U.F.O. K.O. Tower Defense: Place lasers, missile launchers, sniper turrets, and use combat strategies such as airstrikes and the space ray to repel waves of alien invaders in this sci-fi tower defense game.
- 5
Little Kingdom RTS
Single-player alternative to Paper Protocol — playable solo, no multiplayer required. Shares Strategy and Indie with Paper Protocol.
Little Kingdom RTS is an indie real-time strategy game set in a medieval fantasy world. Gather resources, build settlements, raise walls, and grow your small kingdom. Command an army of knights, archers, and mages to fight off rival kingdoms, orcs, and undead.
- 6
Line Defense
Single-player alternative to Paper Protocol — playable solo, no multiplayer required. Shares Indie and Casual with Paper Protocol.
Move or die. Dodge, dash, and build powerful combos to survive relentless enemy waves in this fast-paced arena survival game. Play solo or in chaotic 4-player local co-op.
- 7
Warnet
Single-player alternative to Paper Protocol — playable solo, no multiplayer required. Shares Strategy and Indie with Paper Protocol.
Outmaneuver, outbuild, outthink. In Warnet, the map is your ally and your enemy - master its properties, and you master victory.
- 8
Tank Tower Defense 坦克塔防
Single-player alternative to Paper Protocol — playable solo, no multiplayer required. Shares Strategy and Indie with Paper Protocol.
Tank Tower Defense is a casual tower defense indie game made by a solo developer after one year.Defend your base by building and upgrading various turrets to fend off waves of invading enemies. You can freely customize game difficulty, experience many unique challenging levels.