@ Schattenjäger
On your original question it depends on what you call an Adventure Game. If you mean, like, Monkey Island and those i can't really recomend you a lot since i don't play too many of those, and like even less. If you mean in the broadest sense of adventure, though, and include games that are mostly explore locales both atmospheric and cool looking while solving crazy, complex, evil puzzles and almost casually finding small bits of plot here and there (those are technically also adventures, but people invent weird names for those since they are so diferent from the traditional Sierra and Lucasarts ones, and you totally can't solve them just by trying every item on every hotspot so many so called adventurers cry they are totally impossible to win without a walkthrough!) i can recomend you the first four Myst games (Myst, Riven, Exile, Revelation), Obsidian, Morpheus, Lightbringer, and the like. Add Drowned God for sheer crazy, too. Those just, like, from the top of my furry ears, i can list some more names later if you wanty want, nya.