Uploaded September 2021 | Updated September 2026, 2 weeks ago

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Part of my Half-Life Fact Files series: youtube.com/playlist?list=PLDmcwfn8y0lMtlqcpUhggk0FB1EC2i3iB

This is a full playthrough of the recently dumped Half-Life: Opposing Force Press Demo. Dated a few weeks before the final build, this demo contains a select handful of levels from three unconnected chapters of the full game (and a very brief Boot Camp sequence). While fairly close to release, there are still quite a few intriguing visual differences, audio changes, map edits, gameplay tweaks, and more. Can you spot them all?

Details and download here: hiddenpalace.org/Half-Life:_Opposing_Force_%28Oct_18,_1999_Press_Demo%29
archive.org/details/ofdemo-oct-18-1999

0:00 Half-Life menu
0:23 Opposing Force Press Demo menu
0:36 Boot Camp
2:02 Incoming
4:43 Welcome to Black Mesa
17:12 Friendly Fire
25:47 Foxtrot Uniform
28:05 Closing