http://forums.steampowered.com/forum....php?t=1269419


  • Will I be able to use or play with my demos with the new engine?

    No. Demos taken on older versions of the engine won't run on the new engine. However, you can preserve your old demos by recording them to video files. This can be done either by using Fraps, or the in-built Source Recorder (handy guide on using the Source Recorder).

Please post with any corrections to this guide or any suggestions for it. It would be much appreciated by me.


So if you have any demo's you've been holding onto you'd better convert them to another format before they become inoperable.