Accomplish the indicated achievement to get the corresponding number of Gamerscore points:

Get Jiggy (10 points): It doesn't matter which two, just successfully collect any two Jiggies.
Mumbo Jumbo (10 points): Get yourself transformed by Mumbo Jumbo for the first time. Now that's magic!
Knock out Nipper (15 points): Come out on top in a dust-up with Nipper the crab. Watch out, he's called Nipper for a reason.
Free Clanker (15 points): Liberate Clanker, Gruntilda's rusty and recalcitrant garbage grinder.
Chomp Chomp! (15 points): They're red and no less than 30 of them need chomping. Nuff said.
Move Master (15 points): Discover and master all Banjo's moves... and Kazooie's... but nobody else's. Unless you insist.
Show me the honey! (15 points): Collect all 24 of the extra honeycomb pieces. Yes! Every single one! It's character-building.
The Quiz Master (20 points): Complete Grunty's Furnace Fun quiz show and win the Star Prize. Been paying attention?
Jinjonatored (20 points): Fear the Jinjonator. If you're a witch, that is. The Jinjonator lays the smack down on witches.
Jigsaw Maker (20 points): Bet you thought jigsaws were boring! Bottles disagrees, and has seven of them to be solved.
Cheating Cheato (20 points): Bump into Grunty's disowned spellbook three times as it hops around the place dishing out cheats.
Music Maestro (25 points): There are 900 musical notes out there in the world of Banjo-Kazooie. Real gamers collect them all...