Randomizers in the Speedrunning community are ROM hacks that breathe life into certain old games where a random experience can create a very thrilling run. Recently Games Done Quick showed off a run by Skybilz in The Legend of Zelda Consternation Randomizer which takes the original NES game and mixes up the items with a few other fun bits. In the run you can watch above, Skybilz plays through the Zelda randomizer twice and there are some really fun turns in level 9. Randomizers really flex a Speedrunners game knowledge and require a very deep focus on all the games items, levels and what's required to get to "go mode" which is having all the items such that you can complete the run.