Amiga compatibility issueLike most Amiga games released by Core Design before the Amiga 1200, Heimdall was not compatible with it, or with any other Amiga running a faster processor than the standard 68000. Usually when older games were reissued on budget after the A1200 they were altered to be compatible with it, however Heimdall was not - the budget version states on the box "Compatible with A500 and A600 only" (ironically this doesn't mention that the game needs at least 1 Megabyte, or that it also works on the A500+ and other 68000-based Amigas). Heimdall and its sequel were among the few games Core published which were developed by other companies, which may explain why it wasn't fixed.
DevelopmentAn alternate "bloody" version of the first sub-game (the axe-throwing) was originally programmed, but changed before game's release for obvious reasons.
ExtrasThe manual includes a short (and humorous) comic which introduces the story.
Information also contributed by Jack Lightbeard