Here is the full list of all 25 Lila's Tale and the Hidden Forest achievements worth 1,000 gamerscore.
Conclude a desert stage without falling into quicksand.
Complete all the bonus stages.
Find all hidden passages.
Complete all stages.
Get a new outfit.
The first death by fall.
The first death by thorns.
Defeat the boss without taking any damage.
Find all the owl eggs.
Complete all stages with another player.
Defeat the little Red Wing 100 times.
Defeat the big Red Wing 25 times.
Defeat the jetpack Red Wing 100 times.
Finish a game stage without help from Flee or Zip.
Finish an entire level by defeating enemies with just the power of the Flee or Zip.
Defeat all stage enemies just by jumping on their heads.
Finish a stage without defeating any enemies.
Complete perfectly all stages.
Lose the same bonus stage 5 times in a row.
Play an entire level with a friend.
Take no damage while using the magic carpet.
What do we got here?
Retrieve Flee or Zip at the last second.
Lose a bonus stage by time out.
Conclude a volcano stage without falling into lava.