I resolved to take my queries to another board, and they have at least borne fruit!

It has been suggested that Game 2 might be Chalice of Mostania.
http://gue.cgwmuseum.org/galleries/i...=10&id=2&key=0

Game 3 appears to be "Catapult Capers" from MECC's Conquering Ratios and Proportions.
https://archive.org/details/MECC-A20...nd_Proportions

And Game 4 is "Mazes of Rodentia", a component of MECC's Mind Puzzles. (Another game I have long sought, featuring bees, corresponds to "Queen Bee of Menta", the other game on the disk.)
https://archive.org/details/MECC-A780_Mind_Puzzles_v1.0

Perhaps InsaneDavid will materialize and confirm Games 2 and 3? (He's still around, right..?)