What are some good games I could get for my dad?

He has a PS1 and PS2 that he enjoys playing, but I find it difficult to get him games he actually likes. He enjoys games that have some puzzle solving, but are mostly adventure. The games he likes so far are Tomb Raider (4, Angel of Darkness, Legend, and Underworld), and Resident Evil 4. He's also watched me play several Zelda titles, and likes them for the interesting puzzles but he doesn't actually play them. He also loves the Simpsons, and will play any Simpsons titles, reguardless of their quality (so far we've played the Simpsons Game, Road Rage, and Hit & Run--are there any mroe out there?) Plus, are there any other good games in there series' he likes but haven't played yet?