Super Mario 64 is a 1996 Nintendo 64 game that needs no introduction.
Over the years, speedruns of this game would manage to complete the game with less and less stars. At first there were 70 stars, because Bowser demanded it. Then there were 16 stars, because MIPS the Rabbit demanded it. Then there was 1 star, because Bowser's Sub demanded it. Then there were no stars, but 2 keys, because the door leading to the castle basement demanded it. Now there is 1 key because the viewers are impatient and demanded the game be quicker.
This run completes the game using the legacy 16 stars category, which only allows the use of the MIPS clip to gain access to the 2nd Bowser stage.
Super Mario 64 has a history of publications on this site. If you wish to see how it unfolded since the beginning, see the page SM64TASHistory.
If you're looking for a TAS on the Nintendo DS remake, you can watch it here.