Redline Tangle Trophy in Gunvolt Chronicles: Luminous Avenger iX
Clear "Store Ruins" for the first time.
How to unlock Redline Tangle
Story related, cannot be missed
This trophy is earned after clearing the stage Store Ruins, which is one of the initial stages available after the intro stage. The stage is pretty basic so it’s a good starting stage. The boss is named Rebellio, The Craftsman's Dream. When he is down to 1/3rd he will automatically use Crimson-Death-Thread. An attack that if he locks onto you will do a lot of damage unless you can avoid the changing patterns of yarn. Quickly dash to avoid it.
If you have the Photon Detonator, use that weapon as Rebellio is weak to it.
The official website has a rundown of all of Rebellio’s attacks, for reference.