A lot of them were even worse. Remember nag screens? When you'd start up the game, it would force you to wait 30-60 seconds while staring at some annoying message, telling you to buy the full version to make it go away. I think a few even put these in between levels.

And then when you finally bought the full game, the copy protection was "Please type in the eleventh word in the third paragraph on page 162 of the manual."

Epic was one of the better companies back then. As far as I know, none of their games had that kind of crap.