http://ian-albert.com/misc/gtasa.php
'nuff said.
When I first started hanging out with one group of people, they had started a project of their own to see how far they could get in the original Nintendo Gauntlet. I think they had the goal of reaching level 1000 or something.
Man. . .whatever happened to those games with no end? Another friend of mine once observed that they had some of the most imaginative story lines, even though the graphics and the game variety sucked.
It all depends on how the no-end was accomplished, i.e. trade-offs between repetition & increased difficulty. On the other hand, I am often amazed at how some games managed to squeeze a lot of variety into very little space (e.g. Pitfall and Star Flight).