I second that. The original USA PS3 will play the game just fine as that console has the full PS2 chipset inside as well as the PS3. The Euro / rest of world versions had this chipset removed and emulated the PS2 hardware. This cut backwards compatibility roughly in half - I can confirm the euro PS3 with 4 usb ports will run TAG but it will crash in the menu and when pulling levers.
Buying a cheap PS2 is the best route however I can confirm the game works 100% (as I completed it) on the PC via PCSX2 - a PS2 emulator. You will need a fairly high spec PC though and have the original game disk in your DVD drive although it gives it a good thrashing; you might want to make an ISO image of it. My 6 year old quad core AMD Phenom 2 3.4Ghz with ATI HD4870 graphics card run it just fine.
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