Full list of all 35 Mini Ninjas achievements worth 1,000 gamerscore. It takes around 10-12 hours to unlock all of the achievements on Xbox 360.
Use Futo in combat on all levels
Complete game on hard difficulty
Free all caged animals
Collect all Jizo statues
Travel far in full gallop
Flawless Great River Canyon rafting
Defeat 30 spearmen with the spear
Incite 50 enemies to dance
Defeat 100 enemies with stealth attack
Defeat an enemy as a snowball
Complete a level without being seen
Complete game on easy or medium difficulty
Defeat the Evil Samurai Warlord
Visit all temples
Defeat Boss Screeching Owl
Reach level cap
Retrieve all five missing ninja
Find and free Kunoichi
Collect one of each ingredient
Complete all Wandering Tengu quests
Defeat Boss Timid Swimmer
Find and free Tora
Defeat Boss Windy Pants
Bring sunshine to all denizens of the graveyard
Defeat 50 enemies with the bow
Shake 15 trees
Find and free Shun
Defeat 10 enemies as the boar
Defeat Boss Lumbering Fool
Defeat 10 enemies as the bear
Expend 1500 Ki using Kuji magic
Defeat a large one
Find and free Suzume
Completed basic training
Find Futo