They are just regular difficulty achievments, so just do the heist in all the difficulties.

Simple and Easy

Before you hack the mainframe you will need to press a red buttom close to the mainframe. You can only press the buttom on overkill or a higher difficulty.



Right after you press the buttom 2 turrets will appear on the roof



Will also appear a cloud of gas.



The 2 turrets can be destroyed and the gas will disappear in some minutes, after that you just need to finish the heist.

First you will need to find the archaeologist lab, which have 1/4 chance to appear. After solve the chest puzzle and take the box, but, before leaving look down on the chest, you will see 3 buttons.
Press all the buttons in this order:







After that you will see the masks from Dallas,Chains,Hoxton and Wolf.



And thats it.

This one its a hard, on the weapons lab, you and you crew need to headshot the 5 mannequins in 3 seconds with pistols/akimbo pistols only.



The best advice i can give is use the akimbo Stryk and have alot of patience.

(P.S: Almost no one have done this achievment yet.)

In some small crates you can find some extra loot, you will just need a crowbar and have 4 of them on the map.




But some of them you have things like this.



(P.S.S: Sorry for the low quality screenshots, i play on a potato so... yeah.)