Here is the full list of all 29 Solaroids: Prologue achievements.
Finish through Level 2 on first credit
Clear 1000 Asteroids
10,000 bullets fired
Finish Level 1 on first credit
Collect 100 power-ups
Destroy Terminator
Destroy Infiltrator
Destroy Terminator MKII
Destroy Terminator MKIII
Finish through Level 3 on first credit
Finish through Level 4 on first credit
Finish through Level 5 on first credit
Finish through Level 6 on first credit
Finish through Level 7 on first credit
Finish through Level 8 on first credit
Finish through Level 9 on first credit
Finish through Level 10 on first credit
Destroy Terminator 10 times
Destroy Terminator 50 times
Destroy Infiltrator 10 times
Destroy Infiltrator 50 times
DestroyTerminator MKII 10 times
DestroyTerminator MKII 50 times
Destroy Terminator MKIII 10 times
Destroy Terminator MKIII 50 times
Destroy another player
500 missile hits
100 missiles launched
Destroy other players 10 times