Single-player games like 30 Days of Tower
Below are 8 single-player Steam games similar to 30 Days of Tower, 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 30 Days of Tower page.
Ranked picks
- 1

Beyond The Walls
Single-player alternative to 30 Days of Tower — playable solo, no multiplayer required. Shares Strategy and Indie with 30 Days of Tower.
Immerse yourself in a 3D tower defense game set in a medieval realm. Build towers with unique effects and strategically manage your town to amass resources. Master the elements and devise cunning strategies to triumph in this captivating fusion of defense and city management.
- 2

Skyward Bastion
Single-player alternative to 30 Days of Tower — playable solo, no multiplayer required. Shares Strategy and Indie with 30 Days of Tower.
Skyward Bastion is a tower defense roguelite set on floating islands. Build and upgrade your defenses, survive endless waves of enemies, and explore procedurally expanding maps under a living day-night cycle.
- 3

Ignis Corruption
Single-player alternative to 30 Days of Tower — playable solo, no multiplayer required. Shares Strategy and Indie with 30 Days of Tower.
In this Procedural City-Building and Survival game, you must manage your resources, expand your village, assemble an army and destroy the source of evil, which changed the entire eco system of a land that was once prosperous and peaceful.
- 4

Endless Tower Survivors
Single-player alternative to 30 Days of Tower — playable solo, no multiplayer required. Shares Strategy and Indie with 30 Days of Tower.
Endless Tower Survival is a roguelite tower defense survival game where a single tower fights against endless hordes of enemies. Combine weapons and upgrades to create unlimited power tower and survive as long as possible.
- 5

Here Comes The Swarm
Single-player alternative to 30 Days of Tower — playable solo, no multiplayer required. Shares Strategy and Indie with 30 Days of Tower.
Here Comes the Swarm is a survival RTS with a pause button! Create your strategy, build, manage, and defend your settlements at your own pace. Take the fight to the hive mind and lead expeditions to deliver a deadly blow and eradicate your foes. Will you reclaim Ulora from the relentless Swarm?
- 6

Nordhold
Single-player alternative to 30 Days of Tower — playable solo, no multiplayer required. Shares Strategy and Indie with 30 Days of Tower.
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?
- 7

Champs TD
Single-player alternative to 30 Days of Tower — playable solo, no multiplayer required. Shares Strategy and Indie with 30 Days of Tower.
Champs TD is a typical Tower Defense Game as you know and like. Slay thousands of Minions in randomized Waves. Summon powerful Champions with 28+ unique Abilities. Earn Experience, Level Up and choose from 100+ Talents to improve your Champs just the way you want.
- 8

Calyx
Single-player alternative to 30 Days of Tower — playable solo, no multiplayer required. Shares Strategy and Early Access with 30 Days of Tower.
A strategy game with a new kind of enemy, Calyx puts you in charge of a space mining outpost, locked in battle against powerful plant-aliens. Build your base, gather resources, assemble your forces, and take on the Calyx. With only an out-of-date AI for company, can you survive?