Here is the full list of all 11 Vulkan: Lost Planet achievements.
Kill 10 Enemies using a Pistol
Kill 100 Enemies using a Shotgun
Kill 100 Enemies using a Sniper
Kill 100 Enemies using the Ice weapon
Kill 300 Enemies using the Thunde God weapon
Kill 100 Enemies using the Ultrasonic Machine Gun
Choose the Shotgun
Choose the Sniper
Choose the Blizzard Weapon
Choose the Ultrasonic Machine Gun
Choose the Thunder God weapon