For this achievement, all characters must die before the elevator ride at the end apart from Eric and Nick. Eric and Nick's relationship must also be positive for this achievement. Not being too aggressive over Rachel will help keep the relationship good.
You can earn this achievement from loading up your save file from the all survived achievement, "
Golden Path". Load up chapter
"Strange Aeons", knife the phosphorus canister as Rachel to kill her. I would recommend doing this along with "
Let Me Have a Go!" achievement as both require positive relationship between Eric and Nick.
Have Nick return when dealing with the cocoons. Then as Jason go back for Salim and then pass Salim's first two combat encounters and then after that fail all the following QTEs and combat encounters to get both Salim and Jason killed.
The achievement will unlock on the elevator after Eric and Nick have their moment.
Credit to ThePugHybrid for their
guide.