Full list of all 21 Happi Basudei achievements worth 3,000 gamerscore. It takes around 0.5-1 hour to unlock all of the achievements in the base game.
The base game contains 11 achievements worth 1,000 Gamerscore, and there are 2 DLC packs containing 10 achievements worth 2,000 Gamerscore.
Complete World 1-2
Get killed with Good Karma
Complete World 1-1
Get stuck with Bad Karma
Complete World 1-3
Complete World 2-1
Complete World 2-2
Complete World 2-3
Complete World 3-1
Complete World 3-2
Complete World 3-3
Get a coin
Get a power-up
Kill an enemy
Warp across the screen
Score at least 500 Karma points
Get 3 coins
Hold 2 power-ups simultaneously
Kill 3 enemies
Get damaged mid-air
Score at least 1000 Karma points