Here is the full list of all 29 Alien Shooter 2 - there are The Legend achievements.
Get 3 stars in all missions.
Complete the "Date with Kate" mission.
Complete the game in ARCADE mode.
Complete the game in SHOOTER mode.
Complete the game in SURVIVE mode.
Get 3 stars in all sector-4 missions.
Complete all Micheal the Monster's missions.
Create Legendary weapon.
Complete all story missions in Sector №3.
Get 3 stars in all sector-3 missions.
Money earned: 5,000,000.
Get 3 stars in all sector-2 missions.
Money earned: 2,500,000.
Complete all story missions in Sector №2.
Get 3 stars in all sector-1 missions.
Create 50 items of equipment.
Complete all story missions in Sector №1.
Create 30 items of equipment.
Money earned: 500,000.
300 energy weapon kills.
Disassemble 75 items of equipment into components.
Kill 10000 enemies.
Create 15 items of equipment.
Disassemble 50 items of equipment into components.
300 pistol kills.
Disassemble 25 items of equipment into components.
300 shotgun kills.
300 assault rifle kills.
Kill 250,000 enemies.