Hints for all 300-points tasks
PPC 300: 'trueanswer' is just a cookie.
Stego 300: "Lucy in the Sky with Balls"
Crypto 300: First ciphertext byte is your friend.
Web 300: After deobfuscation you should pay attention to how weirdly PHP compares numeric strings.
Reverse 300: There is no 'LOL executable packer', is there?
Packets 300: Steal flag from server. The one in packet dump is too old.