Planned Release Date: Q1 2026

About This Game

Over 3 million players on mobile have proven the defense. Now, the darkness spreads to Steam with an all-new Cooperative Mode.

UnderDark: Defense is a Roguelite Tower Defense game where strategy meets survival. The unidentified enemies lurking in the dark dungeon are endless, but you don't have to face them alone anymore. Gather your party, build your ultimate defense, and hold the line against the encroaching abyss.

🤝 CO-OP: SURVIVE TOGETHER

The darkness is relentless, but so is your teamwork. Dive into the Online Co-op Mode and coordinate with a friend.

• Synergize Your Builds: One player freezes the enemies while the other rains down fire. Combine different tower attributes to create devastating kill zones.

• Watch Each Other's Backs: Cover multiple choke points and share resources to survive waves that would crush a lone defender.

• Shared Fate: If one falls, the light goes out for both. Communication and quick decision-making are your only tools for survival.

🏰 BUILD, ADAPT, EVOLVE

No two runs are the same. In true Roguelite fashion, you must adapt your strategy on the fly.

• Strategic Placement: Place towers strategically to block monster paths and maximize your damage output. Maze the enemies or create a wall of fire—the choice is yours.

• Buff Selection: After blocking a wave, choose from random buffs to enhance your towers. Will you focus on raw damage, attack speed, or crowd control?

• Infinite Combinations: With a vast roster of unique towers and characters, discover the build that suits your playstyle.

⚔️ FEATURES

• Proven Gameplay: Based on the hit mobile game with over 2 million downloads, now enhanced for PC with high-resolution assets and optimized controls.

• Endless Replayability: Randomly generated enemy waves and buff choices ensure a fresh experience every time you play.

• Global Leaderboards: Compete with other duos around the world to see who can survive the longest in the depths of the UnderDark.

AI Generated Content Disclosure

The developers describe how their game uses AI Generated Content like this:

Generative AI was used during the development process as an assistant for writing code scripts and debugging. Additionally, AI tools were utilized to assist with the translation of in-game text for localization purposes. All AI-generated content has been reviewed and edited by the developers.