This thing goes HARD for a gacha shooter. Snowbreak Containment Zone's Ballad of Chaos event drops these thick, distorted synth layers over pounding electronic beats that feel way too cinematic for a mobile title. Battle OST 1 hits you with this aggressive pulse that shifts between versions like the fight just escalated, and honestly the Ver 2 arrangement might be better.
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Battle OST 2 pulls back slightly but keeps the tension coiled tight. The Boss Fight track though. That one stacks orchestral hits on top of the electronic backbone until it's almost overwhelming. The Theme Song wraps it all up with this vocal hook that actually sticks with you.
If you're grinding Snowbreak events, at least keep the volume up for this one.