> The sequence for triggering the feature depends on the version:
> 1.xx: Press Alt+Shift+Esc+Enter
> 1.01 and later: Hold Alt and then Esc, release Alt and then Esc, press Esc twice and then press Backspace.
1.xx was a slightly prerelease version shipped with the Tulip System PC Compact. I don’t know if anyone has looked in DR5, or the alpha or beta versions that have been preserved.
There’s a similar egg in 2.x. Also from BetaWiki:
> To trigger this easter egg, you must press F1, F5, F9, F4, and Backspace in quick succession.