Path of Exile's whole thing is that it's an action RPG in the style of Diablo 2. It's extremely dense and filled with so many different items and skills that its most dedicated players do all their buildcrafting in a program outside the game. It's for the true sickos who feel left behind by all the modern games that try to simplify the genre. And even though developer Grinding Gear Games released a soulslike sequel to PoE in early access last year, it's still committed to expanding the first game on a regular basis.
Secrets of the Atlas is PoE's 31st free expansion and it comes with a list of new additions to the game, but one of them is something every great action RPG eventually adds: mercenaries. When the update hits on June 13, a new league (PoE's name for seasons) will begin that is all about tracking them down.