Here is the full list of all 29 Hookbots achievements.
Beat solo play campaign in hard mode
Destroy 3 bots simultaneously with a special ability
Destroy 3 bots with one hook shot
Win or lose a Hookball game 7-1
Unlock all party game modes
Score 4 points with stolen eggs
Unlock Robot Castle
Hold the flag for 30 seconds
Win a match with the instakill hook mutator without being destroyed
Complete all mid solo play challenges
Beat solo play campaign in any difficulty
Play your first 5 matches
Unlock Baskethook court
Destroy 2 bots simultaneously with a red sword
Finish a Party Coin Collector game with 50 or more coins
Complete a party session
Complete all easy solo play challenges
Complete all solo play challenges
Unlock Volleyhooks Beach
Unlock Forest Plains
Unlock all taunts
Unlock all bots
Survive the doggobots hard challenge with 1 health left
Unlock big boss mode
Grab 3 enemy robot parts with the Robo-thieves mutator
Destroy 10 bots without being destroyed
Destroy 2 bots with one hook shot
Destroy 1000 bots
Complete the tutorial