I know that isn't what he means but do you mean something like
NetHack and
Dwarf Fortress where the graphics are made from text.
Or do you mean that there are no graphics at all; instead you read writing and select your option?
If you mean the latter they a plentiful on the internet as they are rather easy to make with HTML and if you want to complicate it a bit (as in adding an inventory, health, etc.) a bit of PHP knowledge is required.