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