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