Citadel Zero
Defend the last citadel on a dying alien world. Summon a gacha collection of bio-engineered defense towers, forge a custom loadout, and conquer three modes, story-driven Chronicle, roguelite Contracts, and 1v1 PvP Ascension. Tower defense meets deck-building meta-progression.
Estimated lifetime revenue
Free-to-play
Revenue comes from in-game items and microtransactions, which our price-based model doesn't estimate. The player count below is how many people own it, not what they spent.
Est. players
664
people who own it
Reviews
21
Review score
71%
7.1/10
Concurrent players
0
read Sep 17, 2026, 15:00 UTC
Followers
About
About the game
DEFEND THE LAST CITADEL
The last human citadel stands alone on a dying alien world, watched from the ruins by mutated sentinels. You command its defense. Summon an arsenal of bio-engineered towers, forge a custom loadout, and hold the line across three distinct game modes.
Genres
