Achievements:ACHIEVEMENT – HOW TO UNLOCKBomber Hunter (15 points) – Shoot down 4 bomber planes in 1940.Complete 2001 (30 points) – Complete 2001.Formation Buster (10 points) – Shoot down all the planes from a single formation 3 times in a game.Missile Attack 1 (10 points) – Shoot down 10 bombs in 1910.Missile Attack 2 (15 points) – Shoot down 20 homing missiles in 1970.Perfection (20 points) – Reach 2001 without losing a life.Reach 1940 (20 points) – Complete 1910, making it through to 1940.Reach 1970 (15 points) – Complete 1940, making it through to 1970.Reach 1982 (20 points) – Complete 1970, making it through to 1982.Reach 2001 (20 points) – Complete 1982, making it through to 2001.Rescue Mission (15 points) – Rescue 10 parachuters in a game.Smooth Operator (15 points) – Reach 1940 without dying.