With the introduction of 2.1.0 patch to Diablo 3, a special season mode was introduced. To take part in seasonal game, you must first create a new character. The whole process is no different than a normal character creation.
Select your character class and gender, and check a little checkbox, located at the bottom left corner of the screen (Seasonal Hero). Seasonal character creation has been completed!
What are Seasons in Diablo III?
It's no different than starting your playthrough from the very beginning, but with one exception - you won't have any gold, gems, nor items from "non-seasonal" characters. You won't have your Paragon Levels as well. You will have to expand your chest from scratch, and the same goes with Artisans - all the recipes, formulas will have to be accumulated anew. In return, thanks to playing in the seasonal mode, you have a chance to acquire new, powerful, legendary items, which cannot be found in the "non-seasonal" mode! It also awards you with new special banner and transmogrification options. Seasonal mode adds a number of special achievements, called "Conquests".
You can also compete with other players in several areas - who will be the first one to achieve the maximum experience level, to complete an important event, to finish a Greater Rift in the shortest amount of time, to collect the highest score for achievements, and so on.
All the scores can be tracked on the Leaderboards, which can be accessed from the main menu. Each and every player who manages to get a very good result, or at least better from others, will be placed on the leaderboard as a reward. Your results can be compared with your friends and/or members of your clan.
In Diablo 3, you can complete special season quests, for which you can obtain additional rewards, like for example an unique portrait frame or animal companion. In the future, there will certainly be more various rewards. Your progress can be tracked in a new interface tab.
Progress is tracked by acts and there are different quests in each one of them. The tasks get more difficult as you go through the acts. You will for example have to reach level 60 of Greater Rift, so you shouldn't be bored.
End of Season
During seasonal game you can gain interesting loot, a lot of gold, recipes, gems etc. What is more, you level up additional characters and gain paragon points. What happens to all this when a season ends?
All seasonal heroes will become non-seasonal ones. You don't have to make room for them on your characters' list to make them fit.
Paragon experience you've gained
After the end of season, the amount of experience points earned by you will roll over, not the paragon levels. This results in the fact that non-seasonal and seasonal paragons don't sum up. Instead you will obtain the amount of paragons corresponding to experience points earned by you.
Artisans, blood shards, gold, items and other loot
If the level of your seasonal artisans is higher than the non-seasonal ones, the level will transfer to non-seasonal mode when the season ends. It's the same for all recipes. All of the gold and items that your seasonal character was equipped with as well as what you have in the stash will transfer to non-seasonal mode. Blood shards will transfer in the same way.
All items will be sent to you by email and the message will be divided into categories. You can decide yourself what you want to receive. You can also view the information on the item sent. You can transfer chosen items to your equipment by clicking "Claim".
All achievements you've earned in seasonal mode apply also on an ongoing basis in non-seasonal mode.
In exchange for participating in seasonal gameplay and reaching level 70 with at least one character (it doesn't matter if the mode is regular or hardcore), player receives access to unique transmogrification set: 2 parts for each season. Following parts of the transmogrification set will be available in next seasons.
What to expect in next seasons?
Blizzard tries to introduce changes in each season. There certainly will be new legendary items to gain during season. New conquests, banners, next parts of transmogrification set and much more!