Different error type launching Source_Unpack "SteamStartup() failed: Missing Interface"
7 months ago
United Kingdom

I have had troubles with "CFileSystem_Steam::Init() failed: failed to find steam interface" errors before which went away after I added a steam.dll to the folder. This worked for a few minutes, however, I suddenly faced a different error. I can launch portal from steam from my brother's library. But it has always been this way and so unless something has changed (in which case I will purchase the game) I have not changed anything.

Edited by the author 7 months ago
Texas, USA

you need to own the game on steam and have steam open

Edited by the author 7 months ago
loriswit likes this
United Kingdom

Ok. I had steam open and it used to work. I guess something changed!

Ukraine

thanks for the info

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