Path of Exile

Path of Exile is the undisputed king of complex, hardcore action RPGs, offering a staggering depth of character customization through its massive passive skill tree and gem-based skill system. Developed by Grinding Gear Games, it is a true spiritual successor to Diablo II, renowned for its dark aesthetic, deep lore, and ruthless endgame. Its ranking is justified by its unparalleled build diversity, completely free core gameplay (where paying only buys cosmetic effects and quality-of-life stash tabs), and a seasonal league model that completely refreshes the game every three months with new mechanics and rewards. It's ideal for theory-crafters, min-maxers, and players who enjoy deep, complex systems and a satisfying, loot-driven grind.

Compared to Diablo IV, Path of Exile offers vastly more build freedom and a more hardcore endgame, though with a significantly steeper learning curve.