My controller works with all my other games except for God of War 3, and I've seen that other people are having this issue as well, any way to fix this error?

Check the settings of joystick in game controller and god of war 2 setting (in game). check them this solution is for joystick not working on in a particular game.

Are you running the latest firmware 3.21?

If yes, I would try deleting the Game Data for GOW3 then try again. Hopefully it's just corrupt game data.

Let me know.

This can be caused by a dirty laser in the drive. Try cleaning the laser with a q-tip and alcohol. If this does not fix the problem, the laser may need to be replaced. Contact Sony and see if the unit is still under warranty.

check the memory card.. take the disc out of the system and turn the system on, the click on the memory card and see how many different game saves are on the card.. at this point you will be able to delete some of the old games off of the card and
then it will free up the space required to save "God's of War".

if the back of the disk is blue and u have 1 of theold ps2s it not going 2work that well becuase the old 1s stop read the blue disk first

the problem with god of war 2 is the ps2 lasers are not capable of reading the dual layer disks. either wait and get a ps3, change the laser - i just bought on for 3 quid on e bay brand new. the lasers are not designed to be played the amount they are played. the laser is designed to play 20 hours a week but as sony found out he avg gamer will clock up up tp 60 hours a week so the lasers are only lasting 1/3rd of the time they should. plus if they put a good laser in the machine u would one buy 1 ps2 and then 1 ps3. i have burned out 3 ps2's so far lol. just forget the game or wait till its put on platinum as these are single layerd disk