Source : https://www.teeworlds.com
x64 Version : http://www.positiv-it.fr/QNAP/APP/Teeworlds_Server_0.6.3_x86_64.qpkg.zip
Note :
Config file : /opt/Teeworlds_Server/tee.conf (information here : https://www.teeworlds.com/?page=docs&wiki=server_setup)
About :
Teeworlds is a free online multiplayer game, available for all major operating systems. Battle with up to 16 players in a variety of game modes, including Team Deathmatch and Capture The Flag. You can even design your own maps!