Alex Kidd in Miracle World DX - 100% trophies in 36 Minutes

Short platformer where you die in one hit, but game's pretty generous with game overs so it's not too hard to beat. Often times, taking a game over to refill lives to 3 is recommended if you start a stage with under 3 lives.

100% is pretty straightforward, get all collectibles, beat the game, talk to every NPC (which are all in plain sight), beat boss rush, beat the game without buying anything, and do a few simple tasks on specific stages.

Game also has a strange obsession with Rock Paper Scissors, but all these encounters have the same answers, so to save the trouble of guessing, they are:

1st encounter - Rock then Scissors
2nd encounter - Scissors then Paper
3rd encounter - Rock then Scissors
4th encounter - Paper then Paper
5th encounter - Rock then Rock
6th encounter - Rock then Scissors
7th encounter - Paper then Paper

Boss Rush
1st encounter - Rock then Scissors
2nd encounter - Scissors then Paper
3rd encounter - Rock then Scissors
4th encounter - Paper then Paper

You can do the platinum in one playthrough if you make sure to get all collectibles, don't use infinite lives cheat, and not buy anything in the shop. Afterwards, you just have to use level select to get any stage specific trophies that were missed, and do the boss rush.

0:00 - Start
32:35 - Boss Rush
35:42 - Cleanup