Trilby's Notes just came out and it's the direct sequel to 5 Days a Stranger. This time around it's using a parser interface, which may or may not be a drawback/advantage for some. Personally, I'm enjoying the nice throwback to the classic adventure games :)

For those that haven't played 5 Days a Stranger yet, I strongly recommend doing so post-haste. It's not a terribly long game, but a couple of the puzzles may stump you (there's a walkthrough available on the main site if you get stuck).

If you enjoy classic adventure games at all then you'll get a kick out of Yahtzee's work. The graphics are above-average amature fare, but the writing is absolutely top notch.