Thanks to FreeSlave, now it is possible to play Headcrab Frenzy! on the dedicated Internet server, solo or in co-op with your friends. Although the server is not visible in the "Internet Games" menu, you can connect it using the console. Simply press tilde (~) and type:

connect 46.147.193.183:27023

When you complete a match, results will be automatically published on the public statistics website:
http://hcf.hlfx.ru/

Please remember that if you enter the game in progress, you can only spectate, or you may create a poll to restart the game (and automatically enter it).