chillabis@PC:~$ ver=$(lsb_release -sr); if [ $ver != "16.10" -a $ver != "17.04" -a $ver != "16.04" ]; then ver=16.04; fi
chillabis@PC:~$ echo "deb http://download.opensuse.org/repositories/home:/strycore/xUbuntu_$ver/ ./" | sudo tee /etc/apt/sources.list.d/lutris.list
deb http://download.opensuse.org/repositories/home:/strycore/xUbuntu_16.04/ ./
chillabis@PC:~$ wget -q http://download.opensuse.org/repositories/home:/strycore/xUbuntu_$ver/Release.key -O- | sudo apt-key add -
gpg: no valid OpenPGP data found.
chillabis@PC:~$ sudo apt-get update
[sudo] password for chillabis:
Get:1 file:/var/opt/amdgpu-pro-local ./ InRelease
Ign:1 file:/var/opt/amdgpu-pro-local ./ InRelease
Get:2 file:/var/opt/amdgpu-pro-local ./ Release [814 B]
Get:2 file:/var/opt/amdgpu-pro-local ./ Release [814 B]
Get:3 file:/var/opt/amdgpu-pro-local ./ Release.gpg
Ign:3 file:/var/opt/amdgpu-pro-local ./ Release.gpg
Hit:4 http://ubuntu.mirror.su.se/ubuntu xenial InRelease
Hit:5 http://ubuntu.mirror.su.se/ubuntu xenial-updates InRelease
Get:6 http://security.ubuntu.com/ubuntu xenial-security InRelease [102 kB]
Hit:7 https://deb.opera.com/opera-stable stable InRelease
Hit:8 https://dl.winehq.org/wine-builds/ubuntu xenial InRelease
Ign:9 http://download.opensuse.org/repositories/home:/strycore/xUbuntu_16.04 ./ InRelease
Ign:10 http://download.opensuse.org/repositories/home:/strycore/xUbuntu_16.04 ./ Release
Ign:11 http://download.opensuse.org/repositories/home:/strycore/xUbuntu_16.04 ./ Packages.diff/Index
Ign:12 http://download.opensuse.org/repositories/home:/strycore/xUbuntu_16.04 ./ Translation-en_US
Hit:13 http://repository.spotify.com stable InRelease
Ign:14 http://download.opensuse.org/repositories/home:/strycore/xUbuntu_16.04 ./ Translation-en
Ign:15 http://download.opensuse.org/repositories/home:/strycore/xUbuntu_16.04 ./ Packages
Ign:12 http://download.opensuse.org/repositories/home:/strycore/xUbuntu_16.04 ./ Translation-en_US
Ign:14 http://download.opensuse.org/repositories/home:/strycore/xUbuntu_16.04 ./ Translation-en
Ign:15 http://download.opensuse.org/repositories/home:/strycore/xUbuntu_16.04 ./ Packages
Ign:12 http://download.opensuse.org/repositories/home:/strycore/xUbuntu_16.04 ./ Translation-en_US
Ign:14 http://download.opensuse.org/repositories/home:/strycore/xUbuntu_16.04 ./ Translation-en
Ign:15 http://download.opensuse.org/repositories/home:/strycore/xUbuntu_16.04 ./ Packages
Ign:12 http://download.opensuse.org/repositories/home:/strycore/xUbuntu_16.04 ./ Translation-en_US
Ign:14 http://download.opensuse.org/repositories/home:/strycore/xUbuntu_16.04 ./ Translation-en
Ign:15 http://download.opensuse.org/repositories/home:/strycore/xUbuntu_16.04 ./ Packages
Ign:12 http://download.opensuse.org/repositories/home:/strycore/xUbuntu_16.04 ./ Translation-en_US
Ign:14 http://download.opensuse.org/repositories/home:/strycore/xUbuntu_16.04 ./ Translation-en
Ign:15 http://download.opensuse.org/repositories/home:/strycore/xUbuntu_16.04 ./ Packages
Ign:12 http://download.opensuse.org/repositories/home:/strycore/xUbuntu_16.04 ./ Translation-en_US
Ign:14 http://download.opensuse.org/repositories/home:/strycore/xUbuntu_16.04 ./ Translation-en
Err:15 http://download.opensuse.org/repositories/home:/strycore/xUbuntu_16.04 ./ Packages
  403  Forbidden [IP: 195.135.221.134 80]
Fetched 102 kB in 1s (83,0 kB/s)
Reading package lists... Done
W: The repository 'http://download.opensuse.org/repositories/home:/strycore/xUbuntu_16.04 ./ Release' does not have a Release file.
N: Data from such a repository can't be authenticated and is therefore potentially dangerous to use.
N: See apt-secure(8) manpage for repository creation and user configuration details.
E: Failed to fetch http://download.opensuse.org/repositories/home:/strycore/xUbuntu_16.04/./Packages  403  Forbidden [IP: 195.135.221.134 80]
E: Some index files failed to download. They have been ignored, or old ones used instead.
chillabis@PC:~$