Here is the full list of all 32 PECO achievements.
open game
clear stage1
clear stage2
clear stage3
clear stage4
clear stage5
clear stage6
clear stage7
clear stage8
clear stage9
clear stage10
clear stage11
clear stage12
clear stage13
clear stage14
clear stage15
clear stage16
clear stage17
clear stage18
clear stage19
clear stage20
clear stage21
clear stage22
clear stage23
clear stage24
clear stage25
clear stage26
clear stage27
clear stage28
clear stage29
clear stage30
all clear