Half-Life 2 E3 Tech Demo Map – Port and Upgrade
A port of the physics tech demo first shown at E3 for Half-Life 2, with geometry and texturing errors fixed, and some improvements and enhancements to make the map more fun to explore.
For anyone interested, the VMF is included. It is located at SteamSteamAppsworkshopcontent3628902601155642
If you use the new game UI, the map can be played from the workshop menu. To load the map using the old UI, open the in game console and enter (without quotes) "map techdemo"