The disc might be scratched or dirty. If God of War is working then the PS2 must be fine ... GoW is a dual layer 9 gig DVD if I'm thinking of the right game. These discs are tricky to read and only a good PS2 can read 2 layer DVDs fine. If the wrestling game is scratched, toss it away as insist in it will blow the PS2.
SCPH-10000_GH-001 SCPH-15000_GH-003 SCPH-18000_GH-008 SCPH-30001_GH-005 SCPH-30000_GH-016(V4) SCPH-30001_GH-010(V4)
2xSCPH-10190, 2xSCPH-10350, 2xSCPH-10280
"**** j0 hackers!"
-Sjeep (As seen on TOXIC OS ELF...)