Here is the full list of all 59 Cubemen 2 achievements.
Win a teams 1v5 game
Play a game on another Player's level
Purchase 10 Sid's over a single game
Move a unit into a Healing Station with less than 10% health
Upgrade 35 units to Level 3 in a single game
Kill 500 Units
Earn 10,000 Cubes
Win a teams 1v4 game
Buy 250 Cubemen
Kill 500 Mobs
Use 15 Milo's in a single game
Win a teams 1v3 game
Earn 5,000 Cubes
Upgrade 25 units Level 3 in a single game
Kill 200 Units
Sell a unit that has less than 10% health
Win a teams 1v2 game
Upgrade 15 units to Level 3 in a single game
Catch a Package before it hits the ground
Complete a Skirmish game on every 3 Sprockets level
Complete a Territory game on every 3 Sprockets level
Complete a CTF game on every 3 Sprockets level
Complete a Defense game on every 3 Sprockets level
Complete a Rescue game on every 3 Sprockets level
Earn every World Traveller achievement
Play a Classic Defense game on every 3 Sprockets level
Play a Ltd Cubes Defense game on every 3 Sprockets level
Play a Rockets Defense game on every 3 Sprockets level
Complete a Ltd Men Defense game on every 3 Sprockets level
Earn a Platinum medal in any mode on every 3 Sprockets level
Publish a level online
Play a multi-player game on another Player's level
Complete a 6 player game of Territory with over 50% of the map
Earn 15,000 Cubes
Purchase 500 upgrades
Move a unit into a Teleporter with less than 10% health
Win a game with one surviving unit
Collect one of each type of Package in a single game
Win any game without buying a Grill
Kill 1,250 Units
Kill 5,000 Units
Kill 10,000 Units
Kill 1,000 Mobs
Kill 5,000 Mobs
Kill 10,000 Mobs
Kill 25,000 Mobs
Buy 500 Cubemen
Buy 1,000 Cubemen
Buy 2,000 Cubemen
Buy 4,000 Cubemen
Disarm 15 Mines
Disarm 50 Mines
Destroy 15 Walls
Destroy 50 Walls
Complete all Level 1 missions
Complete all Level 2 missions
Complete all Level 3 missions
Complete all Level 4 missions
Complete all Level 5 missions