Regarding the PlayStation packet captures, most games use the Medius (SCE-RT) library which encrypts the packets.
Here's documentation on PlayStation 2 Medius and Ratchet & Clank 3:
- Medius: https://wiki.hashsploit.net/PlayStation_2#Medius
- UYA Protocol: https://wiki.hashsploit.net/Ratchet_and_Clank_3:Protocol
Here's a few libraries that handle attempting to decrypt those packets: