ps2 plays games but freezes after title

This could be numerous issues, like a electronic pulse ran threw your system and shorted the mother board of the PS2 to destroy some of the function ability of certain things like controller ports, etc. or it could be a dust related issue inside the PS2. Sometimes when dust accumulates within devices, it can connect certain parts together that are negative and positive ports to fry the system. try air dusting inside the PS2. Good Luck and keep us informed