About This Game

Trapped within a localized energy boundary in deep space, your combat unit is isolated against infinite waves of alien swarms. In Kosso Arena, there is nowhere to run—survival demands tight spatial maneuvering, precise positioning, and overwhelming firepower.

Eliminate hordes, collect energy cores, and customize your loadout on the fly. Build lethal projectile synergies, trigger cascading elemental reactions, and hold your ground in high-pressure 10-minute survival battles.

Key Features

• High-Pressure Arena Survival: Confined within a compact energy perimeter, dodge dense swarms where every pixel of movement counts.

• Diverse Modular Arsenal: Deploy a wide variety of weaponry—from ballistic auto-cannons and curved Bezier bows to cascading missiles, chain lightning, and orbital companions.

• Branching Perk Trees: Customize and mutate each weapon with deep upgrade forks, exclusive synergies, and lethal elemental debuffs (Burn, Freeze, Shock, Poison, and Execution).

• Fast-Paced Roguelite Loop: Quick, action-packed 10-minute runs designed for high replayability, featuring escalating difficulty waves and an optional overtime challenge.