All Achievements Speedrun in

24/24 of the Xbox Achievements list, as follows:
Complete "Death of a Showman"
Perform an "Accident"
Unlock all upgrades
Purchase all upgrades for Custom Weapons
Complete the game on every difficulty (counts for all if you do it on Professional)
Get 5 "Silent Assassin" ratings (counts for all difficulties if you do it on Professional)
Accrue $5 million
Collect all Firearms
Achieve Max Notoriety
Complete a level with precisely 47 kills
Achieve a special rating (in this instance, it was "Russian Hare")
Complete Requiem

Been cooking this up for a few years, finally got around to routing it out and completing a run. A lot of the trouble was theorizing where and how to do certain achievements like Max Notoriety or 47 kills without compromising the rest of the run. I already had "All Firearms" routed out for Pro/SA so I could pretty much do that for most of it.
This is not the optimal way to do this category; I was just using my safer strategies that I was using to practice for Hotfix GDQ. If I wanted to really go balls to the wall, I would do faster strats on DotM, and instead of getting the rest of my notoriety on TDDUP, I would actually get my 47 kills on HoC to double dip those achievements so I wouldn't have to replay Till Death (not to mention HoC would be a little faster as well). I would lose some money because of the far worse rating, but I should have enough wiggle room with the amount of cash I get in this run.
I also tried to find a way to potentially get a Russian Hare while also getting 47 kills. Unfortunately, I don't think it's possible on any map. CD was the closest with a 49 kill RH, but even then it's too slow.
Regardless of potential time saves and better routing, I don't think I'll replay this category for a while. This was more of a demonstration of its potential and less of a grind to optimize it.

Hilarious fact: On the achievement guide for this game, it says that it takes 20-25 hours to get all the achievements