(re: Inca Series)
As an IDEA, Inca had a lot of potential. It really was a game of two halves, neither of which was done well enough.
On the one hand you had the utterly confusing, badly designed (as in illogical puzzles, usually no clues as to what to do next) first person adventure bits, while on the other you had the space sim bits which the aforementioned Wing Commander games did far better.
If I remember correctly, WC2 was released not too long before Inca, and that had some of the best writing and character development I’ve ever seen in a computer game. Play it if you can get it.