As in title, I installed SourceSDK Base Multiplayer 2013 and extracted to sourcemods folder but nothing
Make sure you're installing it in the main steam folder's sourcemods, If you've got multiple drives setup on steam it wont work on anything but the main drive. Ensure you're running beta_test and that the tf2classic folder doesnt have a copy of itself inside. Check /steamapps/sourcemods/tf2classic/gameinfo.txt exists, if not you've installed incorrectly.
Answer's: I didn't knowed that but it helped I readed instructions and i always check this I checked it before P.S. First helped!