A third-person view is the essential condition for the hack and slash MMORPG genre, distinguishing it from action games with a first-person camera. The basis of the gameplay is the destruction of opponents and leveling the character, and if you want to find a complex multi-level plot, ent, or social interaction with the game world in this genre it will be very difficult. The diverse NPCs that inhabit the world of H’n’S games have only one goal - to attack the character or give him a quest.
Games of the Hack And Slash genre are often called time killers for the ability to go through the gameplay almost on autopilot, farm hundreds of monsters, collect loot, and improve the ammunition and skills.
Most games of this category have only single-player campaigns. However, there are some exceptions like client-side Hack&Slash MMORPGs - Metal Reaper Online, Path of Exile, Project TL, Epic of Tia, MU Legend, Torchlight Frontiers, Ar: piel Online and others.
Of course, almost all of the named games have a fantasy or near fantasy setting - for example, although Titan Quest is made in the setting of antiquity, many of the monsters it encounters have long been frequent guests in purely fantasy RPGs. One of the few full-fledged exceptions was the fascinating project Metal Reaper Online, which takes place in a post-apocalyptic desert.
Almost all the games on the list use non-target combat - after all, what's the point of catching the focus of one of the hundreds of mobs simultaneously present on the screen if he dies anyway within the next couple of seconds. But you should not expect that each Hack And Slash game in the category will be another Diablo clone - we found a place and completely unlike the legend from Blizzard projects like Ar: piel Online, Path of Exile, Wolcen: Lords of Mayhem, Victor Vran and Warlords Awakening.