Fischer
I have Xbox 360 slim, it is flashed or it has modifaction 3.0 (when i had ps2, we used to call it modification, i don't know what you call these stuff nowadays)
Anyhow 1 CD games that does not require installation, such as fifa, halo reached, nba work fine. However, games that require 2 or more CDs don't work, such as gta, call of duty ghosts, watch dogs do not work, it says CD needs to be cleaned or maybe corrupted, something like that. I bought too many CDs, tried too many stuff, just doesn't work.
Is it because of the modification/flashing? If so, can it be changed, upgraded/downgraded, anything that would make these games work?