Single-player games like Siegebreaker
Below are 11 single-player Steam games similar to Siegebreaker, 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 Siegebreaker page.
Ranked picks
- 1

Abyssfall: The Black Citadel
Single-player alternative to Siegebreaker — playable solo, no multiplayer required. Shares Strategy with Siegebreaker.
Abyssfall: The Black Citadel is a dark fantasy tower defense game where you build defenses, control a battle mage in real time, and gamble on a tabletop-inspired d20 Fate Dice system against waves of abyssal monsters.
- 2

Anathyma
Single-player alternative to Siegebreaker — playable solo, no multiplayer required. Shares Strategy with Siegebreaker.
Control a mighty champion in a cursed medieval realm from a top-down view while building and upgrading towers to fight back waves of enemies. Play solo or in online co-op in this hero tower-defense.
- 3

Realm's Last Stand
Single-player alternative to Siegebreaker — playable solo, no multiplayer required. Shares Strategy with Siegebreaker.
An unforgiving tower defence game focused on strategic placement, unique enemy mechanics and progressively demanding levels
- 4

Conflict of Lords
Single-player alternative to Siegebreaker — playable solo, no multiplayer required. Shares Strategy with Siegebreaker.
Conflict of Lords is an Roguelite Anti-TD game. You will act as the Lord of Foe in Game Development Council, who decided to go his separate way due to a conflict. Invade the newly released game Village Guardian. Summon the Predators to destroy villages. Try your best to overthrow the Overlord!
- 5

Bioguard
Single-player alternative to Siegebreaker — playable solo, no multiplayer required. Shares Strategy with Siegebreaker.
Bioguard is a tower defense roguelite with a biological theme. Help the immune system using a variety of towers, skills and special cards. Develop your strategy to protect your body from invading pathogens and prevent their passage to vital organs!
- 6

Gate Guardian
Single-player alternative to Siegebreaker — playable solo, no multiplayer required. Shares Strategy with Siegebreaker.
Gate Guardian is a fantasy roguelite with a deep spell-crafting. Take advantage of unimaginable freedom in creating your magic spells. Build perfect combinations of skills, change and modify them. Defend Life and Survive Death!
- 7

Islets Defense
Single-player alternative to Siegebreaker — playable solo, no multiplayer required. Shares Strategy with Siegebreaker.
Islets Defense is a turn-based tower defense game in which you build a small village to gather resources and defend your castle. Carefully plan your actions, as each move brings the enemy waves closer! Strategize building placements and play your cards wisely, as timing and order are key.
- 8

Nordhold
Single-player alternative to Siegebreaker — playable solo, no multiplayer required. Shares Strategy with Siegebreaker.
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?
- 9

SC2VN - The eSports Visual Novel
Single-player alternative to Siegebreaker — playable solo, no multiplayer required.
SC2VN is a visual novel about the South Korean StarCraft 2 scene. You play as Mach, a foreign semi-pro trying to make it in eSports who soon learns that success in StarCraft takes more than in-game strategy.
- 10

Aircraft War
Single-player alternative to Siegebreaker — playable solo, no multiplayer required.
Fight against enemy planes with the fun Aircraft War! Challenge your friends with single and double player modes. Conquer the sky, enjoy the victory!
- 11

守卫魔兽-Guardian of Warcraft
Single-player alternative to Siegebreaker — playable solo, no multiplayer required. Shares Strategy with Siegebreaker.
This is a summoning tower defense strategy game, with different abilities of monsters and traps, with different effects. the player will continue to upgrade while defending, Become stronger, and summoning more powerful monsters to resist the brave.