Given that BASS has been available for free for ages and has been part of every ScummVM-download for almost 10 years now (since 2003), I wouldn't exactly call this one overlooked...
If you want an overlooked and underrated Point&Click-Adventure, I recommend Ankh:
It's funny and has some great Monkey-Island-Inspired dialogues and plot. A "hapless wannabe adventurer stumbles into a greater scheme" type of game, set in the time of egyptian pharaohs. It was one of the first titles in the "German Computer Adventure game" wave of the last ten years to see an international release (at least it reached the UK and Spain, don't know about any US-releases though). As far as I can tell the translation's pretty good, though the voice-acting can be grating at times (but then again, so does the voice acting in BASS ^^). The game did well enough to sport a few sequels here in Germany. Ankh 2 was pretty good, but with part three the series took a bit of a dive. I don't know if any games after Ankh 2 even saw an international release.
/edit: (The video is a trailer for the Sequel Ankh 2 by the way, the only ones I found for the first one were German "Let's Play"-clips)

