Achieve at least 15000 in score
Achieve at least 100000 in score
Achieve at least 200000 in score
Achieve at least 300000 in score
Achieve at least 400000 in score
Achieve at least 500000 in score
Finish 1st wave with 3 shields remaining
Finish 2nd wave with 3 shields remaining
Finish 3rd wave with 3 shields remaining
Finish 3rd wave with 2 shields remaining
Finish 3rd wave with 1 shield remaining
Finish 1st wave with 45secs remaining.
Finish 2nd wave with 45secs remaining.
Finish 3rd wave with 45secs remaining.
Must survive the 1st wave
Must survive the 2nd wave
Must survive the 3rd wave