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