If you can get it to work for your system, find a version of the recent game they did on PC. It's notable for being the last project the original cast reprised their roles for, voice-wise and is actually a fairly good story which manages to tie in a lot of former story elements - including the librarian ghost, believe it or not! Explores exactly what Ivo Shandor was meant to have been up to with his architecture and stuff.
A couple of parts which are difficult, but it's worth playing. Feels like a genuine third film and, perhaps one day, it's possible for someone to use the audio files to adapt it into an actual legitimate CGI thrid film.
Make sure to play the amusing answerphone messages while back at base.