Here is the full list of all 67 Kick Ass Commandos achievements.
Rank Up a Commando Major
1,000 Grenades Thrown by the Player
1,000 Rockets Fired by the Player
Kill the Monster Yeti in Mission Pack 5
Complete Mission Pack 4: Going Rogue
Survive the Horror in Mission Pack 4
Unlock Commando Midnight in Mission Pack 4
Rescue the Bunnies in Mission Pack 4
Unlock Commando Ricardo in Mission Pack 4
Rank Up a Commando Captain
Rescue Captain Gary in Mission Pack 4
Complete Mission Pack 3: Bombs Away
Kill 2,500 Enemies
250 Enemies Killed by Explosions
Destory all the Bombs in Mission Pack 3
Rank Up a Commando 1st Lieutenant
Get Major Wood in Mission Pack 3
Unlock Commando Joker in Mission Pack 3
Defeat the Anvil in Mission Pack 3
Complete Mission Pack 2: Krystal Yayo
Rank Up a Commando 2nd Lieutenant
Rescue 100 Commandos
Kill the Rocket Bros in Mission Pack 2
Unlock Commando Blaze in Mission Pack 2
1,000 Knife Stabs by the Player
Rank Up a Commando Sergeant 1st Class
Complete Mission Pack 1: Basic Training
Rank Up a Commando to Staff Sergeant
Unlock Commando 6-Pack in Mission Pack 1
Kill 500 Enemies
Rescue 25 Commandos
Survive the Dreaded Showers in Mission Pack 1
Rank Up a Commando to Sergeant
Unlock Commando Blondie in Mission Pack 1
Rank Up a Commando to Private 1st Class
Rank Up a Commando to Corporal
Kill 100 Enemies
Unlock Commando Mohawk in Mission Pack 1
Complete the Tutorial Mission
Complete Mission Pack 5: DNA Test
Complete Mission Pack 6: Hell on Ice
Unlock Commando Gator Jack in Mission Pack 5
Unlock Commando Berserker in Mission Pack 6
Kill 10,000 Enemies
Kill 25,000 Enemies
Rescue 250 Commandos
Rescue 500 Commandos
Rescue 1,000 Commandos
5,000 Enemies Killed by Bullets
250 Enemies Killed by Flames
500 Enemies Killed by Grenades
100 Enemies Killed by Knife Stabs
25 Enemies Killed by Landmines
500 Enemies Killed by Rockets
50,000 Bullets Fired by the Player
10,000 Flames Fired by the Player
Rank Up a Commando Lieutenant Colonel
Rank Up a Commando Colonel
Rank Up a Commando Brigadier General
Rank Up a Commando Major General
Rank Up a Commando Lieutenant General
Rank Up a Commando General
Kill the Giant Gator in Mission Pack 5
Kill the Queen Beetle in Mission Pack 5
Win Bumper Tires in Mission Pack 6
Defeat Boss Bomber in Mission Pack 6
Survive the Ice Caves in Mission Pack 6