Have you ever considered MechScape including an achievements system? Funorb games incorporate it, and Jagex has agreed it's been a huge success.
World of Warcraft has it, and it's immensely popular. It's basically like, you get points for completing achievements, and usually harder ones are worth more points. It could be as simple as, "reach level 10", or something super crazy difficult!
You can just use them for showing off/a leaderboards type thing, or do the funorb style and let you buy rewards.
Xbox 360 games include them too, for doing things like beating the game on the hardest difficulty, for example.
It seems like it's quite possible, considering Jagex know it's immensely popular, and adds a lot of life to games. Idk. Thoughts?
