Your system information

• Steam client version (build number or date): 1541819448
• Distribution (e.g. Ubuntu): Debian 8
• Opted into Steam client beta?: No
• Have you checked for system updates?: yes

Please describe your issue in as much detail as possible:

Describe what you expected should happen and what did happen. Please link any large code pastes as a Github Gist

I've installed the game 'Tyranny' via the steam client, it downloaded/installed successfully, and when I tried to launch the game a 'Missing Executable' error was thrown. I checked the path that the steam client was looking for the Tyranny executable, and it seemed valid -

nick@Enterprise:~/.steam/steam/steamapps/common/Tyranny$ ls -ltr
total 50608
-rwxr-xr-x 1 nick nick 25750672 Nov 26 20:03 Tyranny.x86
-rwxr-xr-x 1 nick nick 26021488 Nov 26 20:03 Tyranny.x86_64
drwxr-xr-x 10 nick nick 45056 Nov 26 20:15 Tyranny_Data
drwxr-xr-x 4 nick nick 4096 Nov 26 20:15 Ringtones

Then I noticed the steam client indicated it was looking for this location as the executable - .steam/steam/steamapps/common/Tyranny/Tyranny

I renamed Tyranny.x86_64 to Tyranny and was able to launch the game through steam successfully after that.

nick@Enterprise:~/.steam/steam/steamapps/common/Tyranny$ mv Tyranny.x86_64 Tyranny
nick@Enterprise:~/.steam/steam/steamapps/common/Tyranny$ ls -ltr
total 50608
-rwxr-xr-x 1 nick nick 25750672 Nov 26 20:03 Tyranny.x86
-rwxr-xr-x 1 nick nick 26021488 Nov 26 20:03 Tyranny
drwxr-xr-x 10 nick nick 45056 Nov 26 20:15 Tyranny_Data
drwxr-xr-x 4 nick nick 4096 Nov 26 20:15 Ringtones

Steps for reproducing this issue:

1. Install the game 'Tyranny'
2. Right click the game in the steam library and select 'Play'.
3. Weep