Play Assassin's Creed Odyssey on Ubuntu with Steam

When I first purchased AC:O I attempted to run it on my Linux desktop. Unfortunately, nothing happened when I initially tried to launch it. After working through various shenanigans I have found a working combination to play AC:O on Linux.

Note: The performance on Linux is terrible compared to Windows. Everything in this post is true as of February 25, 2019.

Within Steam change the Steam Play version to "Proton 3.16-7 Beta" and restart Steam.
Navigate to your Steam directory in Terminal (default: ~/.steam).
```
cd "~/.steam/steamapps/compatdata/812140/pfx/drive_c/Program Files (x86)/Ubisoft/Ubisoft Game Launcher/"
rm overlay.dll overlay64.dll
```
Or to do this in one command:
```
rm "~/.steam/steamapps/compatdata/812140/pfx/drive_c/Program Files (x86)/Ubisoft/Ubisoft Game Launcher/overlay*"
```
Note: The overlay from UPlay prevents the game from running. Removing the DLL files will fully mitigate the problem. If you do not rename/delete the DLL files you will encounter the following errors in /var/log/syslog:

Feb 25 12:33:54 desktop steam.desktop[3900]: 2019-02-25 12:33:46 [ 185] [DEBUG] Overlay.cpp (644) : Sending overlay start request
Feb 25 12:33:54 desktop steam.desktop[3900]: 2019-02-25 12:33:46 [ 185] [ERROR] ExceptionShield.cpp (66) : Overlay has detected an unrecoverable error and must shutdown.
Feb 25 12:33:54 desktop steam.desktop[3900]: 2019-02-25 12:33:47 [ 185] [ERROR] ExceptionShield.cpp (66) : Overlay has detected an unrecoverable error and must shutdown.
Feb 25 12:33:54 desktop steam.desktop[3900]: message repeated 2 times: [ 2019-02-25 12:33:47 [ 185] [ERROR] ExceptionShield.cpp (66) : Overlay has detected an unrecoverable error and must shutdown.]

Start the game as usual (from CLI steam steam://rungameid/812140)

Edit April 25: Assassin's Creed Odyssey recently updated and the performance issues appear to be gone. HD quality is now easily achievable. Each time UPlay updates you'll need to rm the overlay DLL files.