I’ve found a web with a list of MacOS X games and what hardware they support: if only PowerPC binaries are available (and then, how they perform under Rosetta), or if Intel or Universal Binaries have been released:

• Universal Binary Games

Besides, if you have problems while applying one of those patches to avoid the burden of inserting the CD everytime you want to play (the patch just quits and an error window pops up), you can fix it this way:

•  copy the patch to your hard drive
• right click (or ctrl. left click) -> Show package’s contents
• go to the Contents/MacOS folder
• replace the iPatcher binary with this new one (mirror)

iPatcher fix for Leopard found on Wildan Aliviyarda’s page.