a2
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a3
a4
a5
You destroyed a flying saucer
Destroy 20 Flying Saucers
Destroy 5 Flying Saucers
Destroy 50 Flying Saucers
Kill 100 Invaders
Kill 1000 Invaders
Kill 500 Invaders
Kill 2000 Invaders
Complete 1 wave
Complete 25 waves
Complete 10 waves
Complete 100 waves
Fire 200 Missiles
Fire 1000 Missiles
You fired over 500 Missiles!
You fired over 5000 Missiles
Score 1000 points in a single game
Score over 5000 points in a single game
Score over 3000 points in a single game
Score over 9999 points in a single game
Play 1 Game
Play over 50 games
Play 10 games
Play over 100 games
Obtain a Grade A performance rating
Obtain 10 grade A performance ratings
Obtain 5 grade A performance ratings
Obtain 25 grade A performance ratings