Tomb of the Khan is one tough game, in terms of difficulty. You will have to survive a gauntlet of choices with plenty of sudden dead ends. I can't remember how many times I replayed this, but eventually, I gave up and opened the code to read the ending. It was fairly interesting, and I was glad that I didn't have to throw myself at yet another possible bad end.
There are no checkpoints here, so prepare for lots of tedium if you're trying to work out the path to the good ending by trial and error.
The game is mostly well-written, depicting the historical khan with some sort of fantasy/sci-fi powers. There are also plenty of scares within. That said, the writing can go on for pages and pages before you finally get a choice, and the prose can also get heavy in some areas.
Go ahead and try this one out if you like. That said, if you find yourself in an early grave for the nth time, just do yourself a favor and read the code.