Here is the full list of all 30 Tetrobot and Co. achievements.
Watch the credits until the end
Complete the game with 100%
Unlock all soundtracks in the notebook
Collect all Keys
Collect all Memory blocks in the main robots
Merge all Memory blocks into Memory bars
Repair Spacebot (by collecting all Memory blocks)
Repair Steambot (by collecting all Memory blocks)
Unlock all Faceblox pages created by the most social blocks
Kill Big Mamarina with Psychobot
Unlock all the highlights of Maya’s early career
Repair Turbot (by collecting all Memory blocks)
Complete level 6-3 with 3 Memory blocks without using the Rewind button
Repair Powerbot (by collecting all Memory blocks)
Complete level 5-4 with 3 Memory blocks without killing the slime in the last room
Complete level 5-3 with 3 Memory blocks without killing any slime
Repair Lumibot (by collecting all Memory blocks)
Complete level 4-2 with 3 Memory blocks and 1 Sand block in your inventory
Complete level 4-1 with 3 Memory blocks and 6 Iron blocks in your inventory
Wake Big Mama up before you go-go!
Repair Puddinbot (by collecting all Memory Blocks)
Complete level 3-3 with 3 Memory blocks and 2 Stone blocks in your inventory
Repair Watabot (by collecting all Memory blocks)
Join the Tetrobot and Co. Steam group
Complete level 1-4 with 3 Memory blocks and 2 Wood blocks in your inventory
Complete level 1-2 with 3 Memory blocks and 6 Wood blocks in your inventory
Collect your very first Key
Repair Tetrobot (by collecting all Memory blocks)
Push the Rewind button more than 25 times in a level (at your own risks)
Collect 3 Memory blocks in a level and merge them into a Memory bar