I think he is talking about the chievo for not losing more than 5 villages. If that's what you are after chadders there seems to be some conflicting reports about whether a reset helps or not, some say they have got the chievo at the end by resetting and
some say not so all you can do is carry on and see what happens.
@andykod77 It's a very good game imo but may not be for evryone so you are probably best giving the trial a go.
the challenge levels actually teach you a few new tricks that can help with the campaign, like creating water chutes to get your villagers around quicker etc, anyway I agree its an amazing game! - anyone else spot the
peter molyneux tribute on challenge 7 (xuenylom/molyneux). The challenge had me stumped for a bit too, then I finally twigged it.
From Dust is Fantastic. It's a shame that it's an Arcade game. Would be great as a full retail game but, nonetheless, it's one the best XBLA games I've played. And I heard that in the new update for it, you're allowed to reset and still get the achievement