The story is a "Suda51" classic—intentionally nonsensical, stylish, and surreal. It is often described as a spiritual successor to killer7 and No More Heroes . Don't look for a traditional plot; instead, enjoy the visual flair and the bizarre "Earth vs. Moon" conflict.
The PC version is famously unoptimized, but these steps make it a smooth "Nightmare Edition" experience: killer-is-dead-nightmare-edition-codex
: Use Mondo’s "Adrenaline Burst" only when the enemy is weakened to instantly execute them. This is the primary way to gather "Blood," which fuels your sub-weapons. " which fuels your sub-weapons.