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