Didn't know there was a Retsupurae thread on here.
What's everyone's favorite content of theirs?
Cobra The Space Adventure is easily the most entertaining video game related thing I've seen on youtube.
Darkseed's already been mentioned.
Alone in the Dark 2 and 3 are good for just how quickly things get weird.
King's Quest V is great purely for the guys' reactions to the moon logic puzzles.
Ambition needs no comment.
Retsupurae Kids is... a thing alright.
Kickstarter Nonstarters is pretty good too; especially any with TieTuesday.
Finally, if you can find mirrors of them, the Dahir Insaat videos are gold. You can QUOTE me on that.