Empire of Sin

This achievement is more cumbersome than difficult.

e: Obviously getting this achievement will net you this one:


You need to win a game without anyone else in your crew. In other words, it's a true solo playthrough,. You can build rackets, take them over, upgrade them, etc. You will have to kill every other boss. For your convenience, don't try it at your first playthrough, you need to understand how to control your character to do this.

Although you can try to do this with every boss, I'd recommend someone who is pure ranged character. I limited it to the following options:

Angelo Genna - useful, but low range
Goldie Garneau - ignores defence, at least 3 kills at the usage
Sai Wing Mock - deadly, for you too.
Dion O'Banion - dangerous shotgun, low radius. Extremely situational (clustered enemies or single target) to be useful.
Daniel McKee Jackson - can wipe out entire party but his revolvers are low range
Mabel Ryley - great skill but mediocre initial stats. Requires a bit of finesse to be devastating.

I chose Goldie Garneau.

Make your game 6 neighbourhoods, 6 enemy factions, difficulty Associate (lowest).

TL:DR

Skill path: Killer Queen ->Light Footed -> Heal -> Cold Efficiency/Revenge -> Kill Chain (very important!)

Equipment: The Brooklyn Handshake + Bear Rounds, Golden Service Revolver/unique pistol + High Impact Rounds, Epic/Unique melee, Gun Maintenance Toolkit, Painkillers, at least rare healing kit.

Skip the tutorial.

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Your first story mission is actually quite hard. You can deal with thugs outside peacefully but you won't evade the fight inside. I'd recommend you to leave it for a while and come back when you are stronger. Your signature skill is devastating as it pierces each target in line and small squares adjusting it. In other words, you can get 5 kills using one turn. The damage + crit is also sufficient to kill everything but 100+ HP guards (of course if they are not crit).

Start by exploring the map. Find all enemies on your neighbourhood. If any of them is Alphonse Capone or Angelo Genna, you are set up. Restart if they're not in your game. Buy any alcohole from anyone, the more the better. Make sure not to pay too much. Find a minor gang and start trade with them. Sell every barrel of alcohole and disguise them as whiskey.

Once you have $10,000, buy The Brooklyn Handshake from Capone. You should also farm more money to buy each unique weapon from each boss to make them all weaker.

Patched and no longer works. Frankly, money shouldn't really matter in this playthrough. You can use it to upgrade security or anything for income in your rackets or just leave them at default.

Go for small and medium rackets and kill everyone with your machine gun and signature skill. You can go for a large too but it's not that proficient as you won't have enough customers. However, it has more guards. It's doable from the start but quite hard. Once you have 5 speakeasies, 2 casinos, 2 brothels and hotel you are good to go. Scan the map, look for grups of thugs. Every one has a chest, the more thugs, the better the chest (usually). 5 thugs should grant you the best chests, including unique weapons, boost to police relations (useful for all the fights as you won't have to kill police), 50,000 or hire everyone regardless of your notoriety. However, we are interested in at least epic weapons and equipment. If you get epic M1917 Enfield or Model 8 rifle, start using it instead of your machine gun.

If you have the rifle, your fight should look as follows. The rifle attack ends your turn. Either double attack with your revolver or move, then attack with the rifle to finish the turn. My pistol was good enough for everything until 45 HP, late game 60. Rifle + pistol combo is useful for thugs encounter as it lets you get rid of them quickly. As soon as you get 125 kills with sniper rifle (5 perks, cyan colour), stop using the weapon as you can't get more perks and switch it to your machine gun. Make sure you have 125 kills with machine gun before you start killing bosses. Weapon proficiency will give you more crits and more damage and this will boost your main attack (machine gun) as well as your signature skill (sniper rifle).

If you are injured after fight and have Heal ability, press B, heal yourself and press B again. Do it again if you need more health.

Each neighbourhood has groups of thugs, kill them to ensure you secure everything valueable in the game. As a bonus, you'll get more notoriety and weapon perks so you'll start to become insanely overpowered. Check black market for bullets and gun toolkit, if you see them, buy them.

As you don't have a crew and your empire is quite weak, you'll be frequently attacked (that's why I wrote it's cumbersome, at war you'll find yourself running from one attacking group to the other). Make sure to help your guards and kill groups of enemies as it would help you get even more notoriety.

Once you get your chain kill you can go and kill bosses easily. Start with Capone/Genna in order to get their unique machine gun. Ignore everything and go straight to their safehouse. Kill the guards in front of it and enter it. Start a kill chain on the weakest enemy, then move to the next ones. You'll get 4 kills (with machine gun), even though you have 2 bullets at 4th kill, you will fire 6 bullets. Reload and continue killing everything. Finally your turn would end, leaving boss (if they are still alive) and 2-3 guards. Let them go closer and finish this up. Because of your insane marksmanship, your hit chance is 100% and your hits will be almost all crits. You can unleash up to 500 damage at one go, over 200 for the boss which is enough to kill them at one go.

After you kill Capone, make sure you equip The Brooklyn Handshake, same if you killed Genna, equip Sicilian Kiss.

Once the first boss falls, hunt the rest and finish the mission. Save before each encounter so you'll have a backup if you make any mistakes.

Changelog:

22/03/2021 - couple strategies have been patched. You can no longer buy alcohole from factions to sell it for massive profit to minor factions. Rifle + pistol combo has also been patched, now both of those actions end your turn. Make sure to use as much movement as you need before you start using 1 AP actions.
28/03/2021 - RIP buying uniques from rivals.

This can be done without even going to war with another faction, so the annoying boss fights can be skipped.

First start a game with Sai Wing Mock, then choose the lowest options for neighborhoods, enemies, and difficulty. Once in game go to the black market to buy a submachine gun and a combat related trinket. The best one for us is the stethoscope for more defense and hp. Start taking over precincts. Try to take over as much as you can in your starting neighborhood.

Use small rackets to charge up your bomb power. Most thug controlled small rackets only have three enemies. Stay in full cover as much and possible, move if needed to have as few enemies targeting you while still being able to kill one enemy every turn. Most small rackets can be taken out with zero to two hits received. Large rackets and depots can be taken easily with your bombs. Either on the first turn or second if they aren't grouped together well, use your bombs to do damage and poison killing most on their turn.

When your low on health or money, start going to other neighborhoods to discover the other factions. You can find which areas are major factions by going to the grey areas on the map and the precinct with the question mark by the precinct number is where you should go.

Once you have all factions discovered find the two in diplomacy with the highest rating and lowest threat and make them a business partner. You may have to trade your unused loot for a single dollar to get a massive boost in faction rating. Once your in a business arrangement and you rating with them is high ask for the kill someone favor. Ask both of them to kill every leader not aligned with you. You can ask multiple time to get them go after all the leaders at the same time.

While waiting for you partners to kill the other leaders keep taking over thug controlled precincts and get cash flowing. Make sure to have lots of rackets and alcohol production, we need to have the highest strength on the faction leaderboard.

Keep checking the diplomacy screen to see if you can get either of your business partners into accepting your protection. You want at least one of them to accept. Get the one under your protection to kill the other using favors or if the both are under your protection keep sending them at each other. Once the requirements are meet after protecting them for so long you can buy them out, and since no money was used on gangster upkeep you can buy them out of the city for a relatively combat free win.