HL2 Done Quicker is about to be shown on https://www.twitch.tv/gamesdonequick
This is a segmented run of HL2 on the OLD engine (pre orange-box) which aims to replace Done Quick which was found to be illegitimate since one runner took it on himself to use timescale assistance and save-splicing (starting his segments using a different save than the old one ended).
The final time is 0hs 40mins 49secs which is WAY faster than the last (illegitimate) segemented run time of 1:35, and way faster than the current RTA (real time attack) run of 1:53. It's also still way faster than the current new engine records.