HITMAN

Hokkaido Escalated - 20G

Intro
Since FeizR's guide covers the Meiko Incarnation, this will walk you through the new (February 2017) "Susumu Obsession", which I personally found to be much easier to complete. No video (I'm largely useless when it come to Youtube), but hopefully this text walkthrough will be enough to help you get Silent Assassin on each level, and ultimately, the achievement. As this is my first solution, please let me know if there's anything to be fixed/improved!

Setup
You will need to be Mastery Level 20 to unlock all the gear slots, and in doing so, you'll unlock all the items you'll need for the contract. Then, as your loadout, you'll want:
Gear 1: Shuriken
Gear 2: Disposable Scrambler
Starting Location: Tobias Rieper's Suite
Suit: VIP Patient
Smuggled Item: N/A

You can keep that setup throughout all 5 levels. Since you're Level 20, I'm going to assume you're familiar with the basic layout of level. With that, you're ready to dive in.

EDIT: As Swebbie Jr points out, there's also a way to do this if you're not Mastery Level 20 yet. Head to the comments for his workaround!

Level 1
Eliminate Amos Dexter (any method, any disguise).

Get out of bed, and head out to your balcony. Go to your right, and you'll see Dexter on his terrace. Crouch down by the railing and equip your Shuriken. Throw one at his head when he's on the phone - (he'll say "Teresa, it's me, listen").

Head back into your room and then out the exit of your choice.

Level 2
Eliminate Amos Dexter (any method, any disguise).
Eliminate Ikkei Tsutsui (any method, disguised as Dexter). New

Kill Dexter in the same way as in Level 1. Then, vault over the railing you're crouched behind, and shimmy all the way round onto Dexter's terrace. When you're there, pick up your shuriken, grab his robes, and (optionally) dump his body over the side because you may as well and he seems like a bit of a douche.

Next, head on through Dexter's room, picking up the cowboy bust from his table on your way past. Go out of Dexter's room head forward and you'll see two staff members either side of the corridor. Just behind them, on the left, there's a door leading to a corridor and the kitchen. Be careful not to get spotted, then use the Disposable Scrambler to get inside. Head into the kitchen stealthily.

If you've kept a reasonable pace up until now, your target, Tsutsui, should be on the left, staring at the wall. Ignore him for now, he's not important. Instead, wait until the other chef comes over to the side of the kitchen near you (he'll stand over an oven). Throw the bust at the non-target chef's head, knocking him out. When he's down, take out Tsutsui any way you see fit. I went with a shuriken, but a neck break will do just as well.

Hide both bodies in the freezer by the window. If you use the other one, there's a chance the chef that occasionally stands at the top of stairs will see you dumping the bodies.

Exit Strategy
Head up the staircase into the main eating area and then back towards the cable car exit. Make sure the chef that stands at the top isn't there first, before you make a break for it. Also, don't steal a chef's disguise! The staff members will recognise you.

Level 3
Eliminate Amos Dexter (any method, any disguise).
Eliminate Ikkei Tsutsui (any method, disguised as Dexter).
Get the Fugu fish poison. New
Complication: Sticky Dexter (once equipped, you're stuck in Dexter's disguise) New

Repeat Level 2 up until you've dumped the bodies. Look around the kitchen for a knife. It's on the counter towards the window-end of the work surfaces. Head into the food storage and use the knife to get the fish poison. Head on out.

Level 4
Eliminate Amos Dexter (any method, any disguise).
Eliminate Ikkei Tsutsui (any method, disguised as Dexter).
Get the Fugu fish poison.
Complication: Sticky Dexter (once equipped, you're stuck in Dexter's disguise).
Complication: Wild Card (some things have moved). New

Repeat Level 3. Grab the knife, and with the windows behind you, walk forward and you should see the new location for the fugu. Exit the usual way.

Level 5
Eliminate Amos Dexter (any method, any disguise).
Eliminate Ikkei Tsutsui (any method, disguised as Dexter).
Eliminate Yamato Narita New
Get the Fugu fish poison.
Complication: Sticky Dexter (once equipped, you're stuck in Dexter's disguise).
Complication: Wild Card (some things have moved).

Repeat Level 4 until you've got the fugu fish poison. Look around the kitchen again. You'll see a metal serving hatch in the wall, with a few plates in a line. You want to use the Fugu to poison the plate on the far left. Then, make sure the bodies are hidden and hit the button to open the hatch. As you make your way out, Narita will eat the poison and promptly expire.

And that's that! I hope that helps, and again, if you've got any recommendations/changes/anything, let me know.

Edit: Grammar fixes x4

Edit: Updated based on feedback from Wabbbit and MAJORPOOPY. Credit to them for the suggestion to use the Disposable Scrambler. It's much easier!

Edit: As JaysBetterThanU pointed out, I managed to call Amos Dexter the wrong name all the way through this guide. Edited to fix that.

As mentioned above, susumu obsession is easiest way to do this achievement, heres my video guide for level 5 of the escalation, i made few mistakes like stabbed wrong people and threw wrong item at first, but i think the guide is still pretty valid


Hope you enjoy, if you do and find this helpful, leave a like <3

This worked for me. A bit more fun with the carnage.