Here is the full list of all 29 Sneaky Sneaky achievements.
Kill 2 enemies at once with a bomb explosion.
Lead an enemy to 3 consecutive search points by breaking jars.
Stay on 30 sand tiles with an enemy present.
Buy every shop item at least once.
Consume 10 health potions.
Sneak Kill 3 enemies while they are eating bait in a single level.
Finish a level without killing any enemies.
Sneak Attack a sleeping enemy.
Collect every ruby.
Kill a Burrowing Skeleton with a bomb while its above ground.
Feed a skeleton some bait.
Fully level up your stats.
Have 5000 Gold in your wallet.
Complete the main campaign.
Awarded for completing the City zone.
Kill an Archer with your bow and arrow.
Execute 5 consecutive Sneak Kills in a single level.
Finish a level without being detected. (Excludes tutorial level)
Awarded for completing the Canyon zone.
Kill an enemy with a spike trap and switch.
Anger a Ham Troll into destroying 3 or more objects.
Sneak Kill an enemy who is searching for you.
Survive an encounter after being detected 3 or more times.
Sneak Kill an enemy distracted by a jar.
Awarded for completing the Forest zone.
Destroy or Harvest 100 tiles. (Trees, Rocks, Barrels etc.)
Successfully land 5 'Sneak Kills' from a bush or hay in a single level.
Land a Long Shot with the bow.
Collect your first ruby.