[Lammy]

See also: KONMAI Quality https://namu.wiki/w/KONMAI (long list of typos and other errors in KONAMI arcade games, including infamously misspelling the name of the company itself)

[yxhuvud]

Psygnosis managed to do that as well, in the C64 version of Shadow of the Beast.

https://www.youtube.com/watch?v=R_GdJiEjSho

Spelling error is at 5-8 seconds in. As that is kinda the first thing you see, it is quite noticable.