Press the tilde key ( ~ ) to open the developer console. Type connect (replace with your friend's local or WAN IP) and press Enter.
Most "TF2 online repacks" come with a keylogger or a steam_api.dll stealer. When you run the repack, it scans your computer for your legitimate Steam ssfn files (the files that keep you logged in). Within 24 hours, your real Steam account—including your CS:GO skins or TF2 unusual hats—will be emptied. team fortress 2 online repack