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