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