Update: It's a game. Play all LEVELS and get the flag

Hint2: My mapeditor didn't allow me to create certain letters.. Luckily I have a awesome regex for you!

I remember this like it was yesterday. Nostalgia ftw!! Flag format is BTH_CTF{md5(???)} where ??? is /[A-Z^]/ Also I think the filename is wrong... Luckily the extension is correct