Quote from Le Master on July 10, 2013, 5:29 pm

Difficulty: Medium

The purpose of this is to compile the elements together which make a really good single-player puzzle map from start to finish. It relies on many of the skills you've built after completing Portal; nothing is superfluous and many objects have more than one use; it requires recursive solving; and the whole map comes full circle.

Click here to download Mind Shaft