Players who want to earn the special rewards that are offered during a Season need to complete the Season Journey Chapters I – IV. It’s fine to stop after that if all you wanted was those rewards.
That being said, there is more to the Season Journey than the Chapters. If you choose to continue, the next portion is called Slayer. It provides extra challenges for players. Those who complete Slayer will unlock more parts of the Season Journey.
Masters of The Teganze is one of the class Achievements for Witch Doctors. It requires players to reach level 60 with 2 Witch Doctors. This Achievement can only be earned on Witch Doctor characters.
Haunted is an Achievement that is delightfully described as: “Meet the following ghosts.” While there are some ghosts in Diablo III that are friendly or helpful, the ghosts that are part of the Haunted Achievement are not among them. These ghosts will try and kill your character, so be prepared to fight!
Hatred and Discipline is a short story that was released in 2012. It was part of something Blizzard was doing in the days before Diablo III was released. You can read Hatred and Discipline online (or download it as a PDF).
Blizzard revealed each of the five classes of playable characters in Diablo III, one by one, before the release of the game. There was a “Gathering of the Heroes” page (which has since been taken down) where players could watch a class video, and learn more about a specific class.
There was a short story that accompanied the information about each of the classes. Hatred and Discipline focuses on a Demon Hunter named Valla.
The People Finder Achievement is located in the Campaign tab of the Career Achievements. It requires players to find journals that are described as “People lore books”.
All of these journals are located somewhere in Act IV.
Players must have the Diablo III: Reaper of Souls expansion in order to earn this Achievement.
I earned this Achievement on December 20, 2014.
Chapter IV of the Season Journey in Season 7 included objectives that were different from the Season 6 version of Chapter IV. Things get changed around from one Season to the next, and I think that helps keep things interesting.
I completed Chapters I – III with very little difficulty. Chapter IV provided a challenge (and slowed down my progress a bit).
Players who reach Chapter III in the Season Journey (for Season 7) have hit Level 70 and more than likely have started working on their Paragon Points. Players start Chapter III with two of the set pieces offered by Haedrig’s Gift this Season.
I started Chapter III with three out of its ten objective already completed. I had no idea what Chapter III required. It’s possible to complete objectives for upcoming parts of the Season Journey just by playing the game and doing things you typically would do.
In Season 7, players needed to hit Level 35 before they could unlock Chapter II of the Season Journey. It is possible to accidentally complete some objectives in upcoming Chapters without intending to.
An “Achievement Toast” will pop up whenever a player completes a Season Journey objective. As always, some of the Chapter II objectives are the same as they were in Season 6, and some are new.
In addition to the Season Journey, there are also Season Achievements that players can work on. Some of the easiest ones to get are what I call the “Leveling Achievements”.
You can find this batch of Achievements in your Season Achievement board under the section called “General”. Players earn one of these Achievements starting when they hit Level 10 and ending when they hit Level 70.
Heralds of the New Dawn is the third part in a series of Achievements. Each part requires players to level up a certain number of characters to Level 60. It doesn’t matter what class the characters are, or if they happen to be hardcore or softcore characters. You can mix and match as you see fit.
This series of Achievements was part of the original Diablo III game when the highest level a character could reach was Level 60. (The Reaper of Souls expansion gave players the ability to level to 70).