Sid Meier's Railroad Tycoon did the same thing, except if you didn't correctly identify the ocomotive, it just dropped the game into a limp mode so you could st

Sid Meier's Railroad Tycoon did the same thing, except if you didn't correctly identify the ocomotive, it just dropped the game into a limp mode so you could still trial the experience without the manual. And also it didn't hurt that railway enthusiasts knew two-thirds of the locomotives by heart anyway.