Bomber Crew

Defeat an Enemy Ace

Defeat 4 Enemy Aces (in one campaign)

Defeat all Enemy Aces (in one campaign)

Encounter an Enemy Ace

Complete the first mission

Destroy an enemy target

Fully level up a crew member in two skills

Fly 25 missions

Destroy 250 enemy fighters

Destroy 50 enemy fighters

Complete a mission and land at the airbase with less than 5% fuel remaining

Land at the airbase with only one working engine

Complete a mission and land at the airbase with 2 or fewer crew members surviving

Use 'focus' on all 4 gunner stations at once (Main Campaign)

Bail out your entire crew

Destroy a target using the Grand Slam bomb

Return to the airbase having successfully completed a mission

Fully level up a crew member

Fly 10 missions