My favourite was in Trolls, which I have seen it myself somewhere 1992-1993, later it was put in mobygames:<p><a href="http://www.mobygames.com/game/amiga/trolls" rel="nofollow">http://www.mobygames.com/game/amiga/trolls</a><p>"This game was written on a very slow schneider 10mhz 286 with lots of wait states. If for some reason on your very fast xxxx 25mh 486 this game seems to be fast or unplayable, do no blame us for it was a penny pinching boss who would not buy us reasonable pc's to work on. signed THE PROGRAMMERS OF FLAIR SOFTWARE"
This reminds me of a neat trick I saw in an old 4k demo: adding text (e.g. the creator's name) at the very beginning of the binary. They'd figured out what the text meant in machine language, then added a few opcodes after to undo the effects of executing the text directly.