Diablo 3's Season 4 has arrived on the PC and Mac versions of the game. Players have the opportunity to complete new challenges and earn new rewards.
If you're not familiar with the Seasons feature, here's a succinct summary from Blizzard:
Seasons are an optional, recurring game mode that offers PC players the opportunity to periodically start fresh, leveling new Normal or Hardcore heroes from level 1 without any currency, resources, items, or previously earned Paragon experience. Similar to the separation between Normal and Hardcore game modes, Seasonal heroes will also have their own shared stash and Artisan progression. Any currency, materials, recipes, items, Paragon experience, and Artisan progression earned during a Season will be rolled over to a player's non-Seasonal profile once the Season concludes.
Players can pursue Achievements as well as Season-exclusive challenges called Conquests. The community's progress through S4 will be tracked on Leaderboards. You can also review your own accomplishments through a new Seasons Journey interface.
Even if you don't top the leaderboards, you can still earn new items for your characters. For example, completing all of the chapters listed in the Season Journey will unlock a frame for your character's portrait along with a cosmetic pet. Hitting level 70 with one Seasonal character will unlock the Conqueror's breastplate and helmet for transmogrification. These cosmetic items, the same offered during Season 1, match the transmog pieces given away in Season 2 and 3.
The loot pool for Season 4 also includes some never-before-seen Legendaries. These items can't be found by non-Season characters until S4 is over. The best of these new additions is Henri's Perquisition, an off-hand item for Witch Doctors made from a very unfortunate cat.
Legendaries now have added value thanks to the recently-added item Kanai's Cube. This artifact lets you disassemble Legendaries and then equip their special effects on your character. The Cube also allows you to re-roll a Legendary's stats or upgrade a Rare to a Legendary. Its other functions include removing the level requirement for an item or converting crafting items into different types.
Kanai's Cube was introduced with Patch 2.3, which launched earlier in the week. Patch 2.3 also makes several changes to Adventure Mode, introduces an icy new zone called Ruins of Sescheron, and adds new difficulty levels. That should help you avoid boredom while leveling a fresh character.
Although Diablo 3's Seasons are currently exclusive to PC and Mac, Blizzard says that they may implement them on PS4 and Xbox One in the future. They haven't given a firm timeline for doing so, though. The developer felt that the offline nature of the console editions wouldn't make Seasons feasible but they've reconsidered due to numerous player complaints.