Death Slide
From WikiRaider
The Zip line is a pulley suspended on a cable attached from both ends to opposite sturdy places. It is a feature available only in Tomb Raider II, The Golden Mask, Tomb Raider III and The Lost Artefact.
It first appeared in Tomb Raider II and can be found even in the first level, The Great Wall. In Lara's mansion, the zip line appears as the final part of the assault course.
The zip line helps Lara get from a certain point to another, by sliding on the cable.