Somebody's taken the time to put together a database of completion screens for various old games. Obviously, my favorites are for the Spectrum and the Mega Drive, but YMMV.
The Spectrum version is the more interesting, since I was but a tiny child when such technology was available, so I tended to suck at computer games (the insane, unfeeling bastard-hardness of so many of them hardly helped). The Mega Drive collection mainly pisses me off for reminding me that I only ever got as far as the penultimate screen in Might & Magic, even though I actually knew the password. Grumble grumble grumble.