Single-player games like Prototype TD 2
Below are 8 single-player Steam games similar to Prototype TD 2, 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 Prototype TD 2 page.
Ranked picks
- 1
Hex Tower Boogie
Single-player alternative to Prototype TD 2 — playable solo, no multiplayer required. Shares Strategy and Indie with Prototype TD 2.
A tower defense where towers don't make their own bullets. You build the factory that feeds them: harvest ammo, route it through belts, and stack effects until a single shot homes, pierces, splashes AND one-shots the whole screen.
- 2
Terrorformer TD
Single-player alternative to Prototype TD 2 — playable solo, no multiplayer required. Shares Strategy with Prototype TD 2.
Terrorformer TD is a tower defense roguelite with a procedurally generated map that YOU shape! Raise or lower tiles, divert enemy paths and funnel monsters into perfectly designed killzones. Randomly drawn cards result in plenty of run variety, as you seek to survive endless waves of enemies.
- 3
Hexa Puzzle Saga
Single-player alternative to Prototype TD 2 — playable solo, no multiplayer required. Shares Strategy and Indie with Prototype TD 2.
A block hexa puzzle roguelike where you optimize hexagon puzzles by putting cities together and extending roads to help your kingdom endure. Daily leaderboards show off the greatest rulers.
- 4
Crystal Tower Defense
Single-player alternative to Prototype TD 2 — playable solo, no multiplayer required. Shares Strategy and Casual with Prototype TD 2.
Stop an endless hoard of crystal-type enemies, with different attributes, from reaching the portal to earth! You can build your own labyrinths, unlock new turrets, upgrade them, unlock abilities, and also gather permanent bonuses.
- 5
Nordhold
Single-player alternative to Prototype TD 2 — playable solo, no multiplayer required. Shares Strategy and Indie with Prototype TD 2.
Enemies are coming! Every decision matters: build your city, grow the economy, and prepare for enemy waves. Strengthen your defenses, adapt your strategy, and unleash your hero’s full potential. This unique Tower Defense will test your skills – are you worthy to claim a place at Valhalla?
- 6
Isle of Arrows
Single-player alternative to Prototype TD 2 — playable solo, no multiplayer required. Shares Strategy and Indie with Prototype TD 2.
Isle of Arrows is a Puzzle Tower Defense game in which you build a fortress in the sky. Place towers, expand the isle, and build your own paths. Can you find the perfect spot for each tile to beat the RNG and defend against waves of invaders?
- 7
Hex Harmony
Single-player alternative to Prototype TD 2 — playable solo, no multiplayer required. Shares Strategy and Indie with Prototype TD 2.
Restore the balance between Nature and Human using futuristic technologies. Each island is a true puzzle. Build thoughtfully, observe interactions, and shape a durable world in a calm and accessible experience.
- 8
STEM Defense
Single-player alternative to Prototype TD 2 — playable solo, no multiplayer required. Shares Strategy and Indie with Prototype TD 2.
Engage in epic battles against microscopic foes in 'STEM Defense', a strategic tower defense adventure set on a hex-grid. Harness the immune system's power, BUILD your defenses and fend off waves of pathogens, unlock potent cells and upgrades, and evolve your defenses for a grand survival showdown!