Since there is no list about this yet, I collected every (2D) PoP game that I know to have built-in cheats.
PoP1:
DOS: http://popuw.com/cheats.html and viewtopic.php?p=5639#p5639
Amiga: viewtopic.php?p=14745#p14745 and http://popuw.com/amiga.html
Apple II: viewtopic.php?p=15343#p15343 and it also has easter eggs: viewtopic.php?p=23220#p23220
SNES: viewtopic.php?p=15926#p15926
SEGA Mega Drive (European version): viewtopic.php?p=21551#p21551
Atari ST (cracked version): "PRESS -T- TO ACTIVATE" http://popuw.com/atari.html
ZX Spectrum (cracked version): "Press PHT to skip levels." http://popuw.com/spectrum.html
PoP2:
DOS: http://popuw.com/cheats2.html and the new cheats in joystick mode: viewtopic.php?p=11550#p11550
Mac: http://popuw.com/pop2mac.html
SNES: http://popuw.com/pop2snes.html (Stage Skip)
PoP Harem Adventures: viewtopic.php?p=24060#p24060
And the PoP clone Cruel World also has some cheats: viewtopic.php?p=13344#p13344
Is there anything else that should be on this list?
Which PoP games have cheats?
Re: Which PoP games have cheats?
PoP1 for TurboGrafx / PC Engine has a level skip glitch/cheat: viewtopic.php?p=24360#p24360