Kreedz Climbing
http://www.kzmod.com/news.php

A HL2 modification

Kreedz Climbing is a unique, Non-violent, puzzle-type, 3D-First Person game
where the player attempts to climb or jump his way to the top of any given
environment, in a race against time and against other players. There are no
lock-n-load type weapons in this game. The player is equipped with a
climbers tool which is primarily designed to use against environmental
obstructions that can be broken.

http://www.kzmod.com/content.php?content.1

Argh no download yet oh well
http://mods.moddb.com/4304/Kreedz-Climbing/

- Peter