Here is the full list of all 18 The Gallery - there are Episode 1: Call of the Starseed achievements.
Spend the night in the Beach tent.
Listen to all the tapes in the game.
Blink 1000 times.
Smash 15 special bottles.
Return all the starfish to the sea.
Hold the radio on the Beach for three minutes.
Light 5 fireworks.
Start a fire on the Beach.
Sink 5 volleyball shots in the Beach hoop.
Complete Episode 1.
Complete the Laboratory level.
Complete the Lower Sewer level.
Complete the Upper Sewer level.
Complete the Beach level.
Douse 6 candles.
Shoot 3 bells with one clip.
Complete the Tutorial level.
Pick up 4 items.