The ZMan:
Yes, the Bartle test was designed with respect to multiplayer online games. But it does remain relevant for many single-player games. In fact, the very Wikipedia article you linked to mentions Gamerscore as an incentive for Achiever types, and most sources of Gamerscore are not coming from MMOs and MUDs :)
The ZMan:many games have their own awardments... if its really just about getting those then you can do it already. I know you can't compare with your friends but if you are the sort of person who doesn't care about score then who cares what your friends have eh?
Yes, I realize indie developers can and do implement awards in their games. But if there can be a system in place to show off your shinies, why not? I mentioned badges in
City of Heroes earlier. They don't have a system to display your badge count (aside from clicking on another character in-game and viewing their badges). But the players developed not one, but two independent websites to share your count with the world, as well as software to verify your claims. One player even gained fame within the playerbase simply for consistently having the highest badge count. As I write this, he's only missing 4 of the 696 badges it's possible for him to obtain. (and all of those 4 are based on real-world time, rather than game time)
Considering Microsoft has a system in place for the platform to have such badges visible to the world, I personally don't see a reason against granting 0-gamerscore achievements to the indie games. Particularly since the major argument
against achievements in indie games is abusing gamerscore.
The ZMan:I dont think it would be worth the XNA team spending time and effort to go after 0 point achievements in terms of us making more sales... unless its a 1st step towards real gamerscore in which case its obviously worthwhile.
And if they do give us 0-GS achievements, it's just a small extra step (as far as the framework goes) if they change their mind and allow GS in some form.
Actually, I take that back. I can see a reason not to allow 0-GS achievements: "Because the Xbox players expect to get gamerscore for their hard-earned achievements"
(Pretend "hard-earned" is dripping with sarcasm)