This is the homepage for 'ZX81 Civilization'. You don't know, what
this means?
Now, 1992 Sid Meier, the genious programmer and author of strategy
games invented the game "Civilization". It's one of the most subtil
and dynamic games ever written for any computer. And it is perhaps
one of the rare games, which really uses the hardware power of PCs
for other things than television like blob pictures. It is a middle thing
between chess and Wing Commander (TM), but it's more than both.
However there is nothing which cannot be performed by a ZX81 much better ;-).
So have a look to different versions of small civilizations for the ZX81: