When Sprocket is grabbed by the vines at the Captain's Quarters, slam the metal windows shut to cut the vines.
First you need to get the vine. It's on a roof all the way to the left of the map. Just use the vine when the monster comes.
In the underground below the Hub, you use it to rope a steam pipe to knock out an attacking monster in the pipes.
you can get it on the far left of steamworks island, past the living headquarters.
In the underground below the Hub (through the hot hatch), there is a thing moving through the pipes and it turns out to be a monster plant. Use the vine to rope the steam pipe which kills the monster plant.
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You use it to lasso a pipe in the underground below the "hot hatch."
There is a loop of old vine on the roof of the building at the far left of the island, past the Living Quarters. You should get it early because you will need it at the Hub.
The old vine is on the roof of the Storeroom building left of the Living Quarters. Use the steam exhaust fan to lift you to the roof. You will need the vine underground at the Hub.
you use it to defeat a vine monster
Take it to the vine spot and click space bar to cut the vines. (it is to the left)
When you are in the underground tunnels below the Hub, a monster will attack. Use the vine, and it will lasso the overhead steam pipe and repel the monster. Get the vine from atop the storeroom annex (left of the Living Quarters). Get the robot crab from the Living Quarters doorway, and the robot Sprocket from inside Sully's. You need all three before you can go underground through the Hot Hatch.
The "rope" is a coil of old vine on the roof of the , left of the Living Quarters. You need it underground at the Hub.