Here is the full list of all 16 Oppaidius Tropical Cruise achievements. It takes around 0-1 hour to unlock all of the achievements on Windows.
5 minutes in a row looking at the cleavage rubbing scene… will it be enough…? (Of course it is not)
You achieved Angela’s max level affection points!
You set the “boobage level” to 100!
Look at those melons!
You saw all the tic tac toe boxes’ scenes!
You unlocked every art in the game! Now check the gallery, a surprise could await you there…
You saw the VERY SCARY devs’ ghosts!
You heroically resisted until the end…
You saw the Angela without panties secret scene!
You achieved Rika’s max level affection points!
You remembered about that time, with the seagull…
You chose the wrong “shortcut”…
It’s the first time I’ve seen her smile…
You began the adventure!
Right, that’s the kind of “achievement” I didn’t need…
You surely are somebody’s type-you just need to hang in there!