Here is the full list of all 32 SpongeBob SquarePants: Battle for Bikini Bottom - there are Rehydrated achievements.
Find all (80) of Patrick's Socks
Get 100% completion. All golden spatulas and all socks
Get all 100 Golden Spatulas
Complete the Rolling Ball Puzzle in Mermalair
Talk to Squidward 10 times as SpongeBob.
Complete Squidward's Mission in Jellyfish Fields
Defeat Prawn in the Mermalair
Find all the hidden Golden Spatulas in Bikini Bottom.
Defeat Robo-Plankton and neutralize SpongeBot SteelPants' Brain.
Defeat SpongeBot SteelPants in the Chum Bucket Lab
Get 75 Golden Spatulas
Defeat the Flying Dutchman
Reclaim the Flying Dutchman's ship in the Flying Dutchman's Graveyard
Find all the Lost Campers in Kelp Forest
Destroy at least one type of every robot in the game. Bosses don't count
Defeat 100 robots as Patrick in the campaign.
Get All Golden Spatulas in the SpongeBob's Dream level
Get 50 Golden Spatulas
Find half (40) of Patrick's Socks
Defeat Robo-Patrick in the Industrial Park
Clear all the Ski slopes in Sand Mountain
Defeat 100 robots as Sandy in the campaign.
Finish the main missions of Rock Bottom
Defeat Robo-Sandy in the Poseidome
Get 25 Golden Spatulas
Finish the main missions of Goo Lagoon
Defeat 100 robots as SpongeBob in the campaign.
Complete Mrs Puff's Mission in Downtown Bikini Bottom
Find 15 of Patrick's Socks
Collect 10 Golden Spatulas
Defeat Jellyfish King.
Collect everything in SpongeBob's House.