Here is the full list of all 66 Block N Load achievements.
Win 10 online matches
Start a match in a two-player team
Mine 1000 blocks
Set a title, icon and border
Travel 10000 units
Level up your first Hero
Get your first online kill
Accumulate 10000 resources in a single match
Use a hero's active ability
Win an online match
Collect all tokens in Practice Grounds.
Destroy the enemy base in Practice Grounds.
Build your first block
Mine your first block
Win 100 online matches
Defeat 1000 enemies
Perform 1000 critical hits
Accumulate 1000000 units of resources
Kill 100 enemies while you are below 30% hit points
Kill 3 enemies in 10 seconds
Level up Sergeant 'Sarge' Stone to Hero Level 50
Level up Cogwheel to Hero Level 50
Level up Sweet Science to Hero Level 50
Level up Yury the Yeti to Hero Level 50
Level up Anthony 'Tony' Turretto to Hero Level 50
Level up 'Doc' Eliza Doolally to Hero Level 50
Level up Dream Genie to Hero Level 50
Level up Vander Graaf to Hero Level 50
Level up Nigel Purdey-Longshott to Hero Level 50
Level up O.P. 'Juan' Shinobi to Hero Level 50
Level up Astarella to Hero Level 50
Level up Kira-chan to Hero Level 50
Level up Sergeant 'Sarge' Stone to Hero Level 100
Level up Cogwheel to Hero Level 100
Level up Sweet Science to Hero Level 100
Level up Yury the Yeti to Hero Level 100
Level up Anthony 'Tony' Turretto to Hero Level 100
Level up 'Doc' Eliza Doolally to Hero Level 100
Level up Dream Genie to Hero Level 100
Level up Vander Graaf to Hero Level 100
Level up Nigel Purdey-Longshott to Hero Level 100
Level up O.P. 'Juan' Shinobi to Hero Level 100
Level up Astarella to Hero Level 100
Level up Kira-chan to Hero Level 100
Complete 3 Challenges
Complete 10 Challenges
Level up Kreepy to Hero Level 50
Complete 50 Challenges
Level up Kreepy to Hero Level 100
Complete 100 Challenges
Level up Trondson to Hero Level 50
Level up Trondson to Hero Level 100
Complete 1000 Challenges
Reach Player Level 6
Reach Player Level 20
Reach Player Level 50
Reach Player Level 100
Achieve a Silver League Rank
Achieve a Gold League Rank
Achieve a Pro League Rank
Reach Hero Level 10 with a Brawn Role Hero
Reach Hero Level 10 with a Brains Role Hero
Reach Hero Level 10 with a Skills Role Hero
Reach Hero Level 10 with a Hero of each Role
Level up Roly Poly to Hero Level 50
Level up Roly Poly to Hero Level 100