Bastion: Tower Defense

Build a defense that can survive the swarm. MASKLINGS: BASTION brings offline tower defense battles and roguelite strategy to a portrait layout. Choose towers, spend limited energy, and adapt as five waves push toward your bastion. Basic battles work offline; online rankings require an internet connection.

Three towers, different jobs

Prism Needle delivers focused attacks, Chroma Mortar strikes groups, and Cryo slows non-boss enemies. Combine their strengths instead of relying on one answer to every threat. Think about how the defenses work together and which part of the route needs support.

Build, upgrade, and change your plan

Your energy must cover both new construction and upgrades. In the preparation phase, choose where to place a tower, improve it, or sell it to change your layout. Set target priorities to focus on leading enemies or stronger opponents before the next wave starts. Look for a balance between reinforcing a useful position and adding another attack style.

Five waves and boss encounters

Each run has a clear goal: defend the bastion through five waves. Read enemy silhouettes and boss warnings as the battle develops. A defense that handles the early approach still needs a plan for tougher opposition. Weekly boss variations give you another reason to reconsider your setup and try a different combination of towers and upgrades.

Choose abilities during a run

Your opening layout is only part of the strategy. Make ability choices as the run progresses and use them to shape your defense. Consider what you already built, what has caused trouble, and where an extra advantage would help most. Choosing an upgrade is another tactical decision, not a reason to stop paying attention to the battlefield.

Keep building beyond one battle

Visit the Research Lab to develop your long-term progression. Daily Operations and achievements provide additional goals alongside defending the bastion. Work toward a reward, return to a challenge, or explore a different tower mix on your next attempt. There is more to consider than whether a single wave was cleared: your wider progress gives each return a direction.

Find your place on the leaderboards

Compare scores in world, country, daily, and monthly season rankings. Check your own score and position within each ranking, then set a target for your next run. The boards offer different perspectives on your progress, from a daily result to a longer season. These are score leaderboards, not live head-to-head battles against other players.

Strategy at your own pace

Pause when you want time to assess the situation. Use double speed when you are ready to move through the action faster. The portrait layout keeps the battlefield and its controls together on a vertical screen, with bright tower effects and distinct enemy shapes that help you follow the attack. Switch between Korean and English in the game.

Start without creating an account

You can begin playing without an account registration step. Learn what each tower contributes, see how targeting changes a fight, and build a plan around the energy available to you. A new attempt is a chance to rethink your choices: keep a useful arrangement, change a weak point, or pursue a better score with another approach.

At a glance

• Three tower types with focused, area, and slowing attacks
• Five-wave runs, boss encounters, and weekly boss variations
• Tower placement, upgrades, selling, and target priorities
• Ability choices during a run and Research Lab progression
• Daily Operations, achievements, and ranking goals
• World, country, daily, and monthly season scoreboards
• Pause, double speed, and Korean and English support

Read the path, spend carefully, and make every tower count. Your next defense begins with a decision.

Recent changes:
Updated the advertising SDKs and mediation adapters to improve ad integration stability. Existing region-based privacy protections remain in place.