I'm also told that the game Agon had something like this, and now I kind of wish I'd grabbed it when it was on the game store shelf. Has anyone tried it, and if so, how was it to play?
Funnily enough, the local gaming store over here, Fantasiapelit, does carry
AGON and still even appears to have copies left. They usually don't stock all that much by way of "indie" RPGs. (They also sell
Maid, incidentally: that would be another RPG which is pretty much based on PC rivalry by default as the group competes for the highest Favour.)
Anyway, going by what I remember from various discussions, in
AGON the GM receives a specific budget for building monsters and other perils, not unlike in
Rune. In this case, the resource is called Strife and it equates directly to how much Glory (think XP) defeating the challenge will be worth to the victorious PC. Gaining ten points of Glory always grants one point of Legend, and when the characters themselves leave play (inevitably because of their gradually accumulating Fate), the Legend that they've earned during play not only determines what
kind of an end they ultimately face, but it also acts as their final score, so to speak. The highest Legend wins the game.
Keep in mind that intraparty conflict and PvP can be a touchy subject, though, and won't appeal to all players. For me, it definitely depends on the game in question.