- "Vincent Brooks... How are you feeling? Who, you ask...? Someone you know all too well. Hahahaha!"
- —Shadow of Vincent
Shadow of Vincent is the sixth boss of Catherine and the boss of the Spiral Corridor. This boss takes the form of a gigantic Vincent Brooks clad completely in shadow. He wears a gleaming white mask that covers its entire face, with one yellow eye visible, in a twisted smile.
The Shadow of Vincent battle different than previous battles, due to the boss actually circling around the stage instead of climbing up it. All of his attacks are scripted and trigger when Vincent reaches a certain point. The Shadow of Vincent only directly attacks when he bashes through a wall of blocks, if Vincent is standing in front of the wall he is killed instantly. This shatters some of his mask.
Shadow of Vincent will also make a strip of unmovable blocks in the middle of the stage and later envelops the whole stage in shadows. This only leaves the gleaming light from his mask and the stage is only visible when the glare of the lights come every so often.
Steve Delhomme is found, once Vincent reaches the end, just a few steps of blocks away. They both will have a small chat before the Shadow of Vincent catches up with them. The shadow's mask finally shatters off, revealing a ugly version of Vincent's face. Steve, paralyzed with fear, is suddenly grabbed by him and it tosses Steve up into his mouth, swallowing him whole. Vincent, terrified, escapes the Nightmare.
The Shadow of Vincent symbolizes everything Vincent is ashamed of. The mask symbolizes Vincent hiding his feelings from Katherine McBride for a while, as Vincent climbs higher the mask breaks away more and more. In the end, his choice becomes clear: either he gives into these feelings and shows Katherine his selfish ugly soul, or he accepts what he wants, no matter how it scares him, and commits to Katherine.
- "There's no point in repenting now!"
- "I know all your secrets."
- "It's too late!"
- "All that matters is yourself, right?"
- "Do you really think she won't find out?"
- "You don't know anything."
- "How long you gonna keep it a secret?"
- "Fucking liar."
- "You can't escape!"
- "Quit resisting!"
- "There's nowhere to run!"
- "I'm always watching you..."
- "Your sin won't just disappear."
- "You're scared of being chained down, right?"
- "There's no turning back!"
- (hysterical laughter)