Galactic Siege
Games like Galactic Siege

Games like Galactic Siege

A challenging 3D tower defense game with a 20-level campaign and endless leaderboard mode.

Siege of Centauri
A sci-fi tower defense game about defending a colony world with upgradable towers and orbital strikes, playable in about 7 hours.
2019-09-12
- Action
- Science fiction

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Games like Galactic Siege | IndieDex

Galactic Siege
Games like Galactic Siege

Games like Galactic Siege

A challenging 3D tower defense game with a 20-level campaign and endless leaderboard mode.

Siege of Centauri
A sci-fi tower defense game about defending a colony world with upgradable towers and orbital strikes, playable in about 7 hours.
2019-09-12
- Action
- Science fiction

Strategy

Bird view / Isometric

Indie

Spoids

A short, challenging space tower defense game about traveling planet to planet and defending against the Spoids, with roughly 8 levels and no tower upgrades.

2017-02-20

Action
Strategy
Indie

Eternal Siege

A challenging single-player tower defense spanning Ancient Greece to the modern era, with spells, min-max resource management, and reviewer playtimes from around 4 hours to 38+.

2025-11-17

Action
Bird view / Isometric
Tactical

Radiant Defense

A compact single-player tower defense game about building a space fortress and upgrading weapons to survive alien waves, with a colorful tone but occasional stability issues.

2014-07-11

Science fiction
Strategy
Indie

Alien Robot Monsters

A retro-styled sci-fi tower-defense game where colonists hold off alien robot hordes with an expanding tower upgrade system, delivering lighthearted fun and a reasonable challenge over a dozen-plus hours.

2015-09-09

Action
Strategy
Indie

Rush for Glory

A tower defense game about defending against an alien invasion via tower building and upgrades in a singleplayer campaign, with mixed reviews and a roughly 3.5-hour reviewer playtime.

2014-06-16

Action
Strategy
Real Time Strategy (RTS)

Gore Storm

A single-player action wave-defense shooter on an alien planet, blending base upgrades and turret placement with a free-movement horde mode; reviewers find it simple and satisfying despite a clunky UI.

2023-03-10

Tower Defense Ultimate: Crashfall Protocol

A compact sci-fi tower defense campaign with escalating alien waves, unlockable towers, and an addictive difficulty curve.

2026-03-31

Zerion 12

A short sci-fi tower defense game about building towers against alien waves, but missing wave-speed controls makes it feel slow and tedious.

2025-10-01

Action
Strategy
Indie

Qubicks

A compact tower defense roguelite where you place and upgrade towers to fend off alien waves across procedurally generated levels.

2025-10-10

Strategy
Bird view / Isometric
Indie

Elemental Magic Wars

A casual hero-based 3D tower defense with elemental reactions and RPG progression, though current builds suffer from performance lag and sparse tutorials.

2026-06-22

Strategy
Bird view / Isometric
Indie
Role-playing (RPG)

Skyline Defense: Legends of the Aether

A relaxing single-player sky-island tower defense game about building towers and managing an economy to fend off enemy waves across multiple difficulty levels, with a roughly 10-hour campaign.

2025-09-12

Siege of Centauri