The tiers feature is a heirarchy system that shows off a players progression. It's directly influenced by Legend Score and Achievements. The higher your Legend Score increases, the higher your rank will be.
Reaching each tier awards you with cosmetic and functional items, these can be viewed in the "Season Tiers" located on the Start menu.
Tier rewards, along with tier requirements change every Season.
Here you can view each tier, their required Legend Score, along with their rewards.
There are currently 6 Tiers available, each needing a specific Legend Score requirement:
Bronze 25,000 Legend Score
Silver 50,000
Gold 100,000
Platinum 200,000
Diamond 350,000
Legend 500,000
You obtain your Tier rewards directly from the Achievements window.
It's not possible to buy Tier rewards from NPCs or the Premium store. However, as Tier rewards aren't soul-linked, you are able to trade, buy or sell them to players.
Tier Rewards, along with Legend Score requirements change each Season.
Yes. Tier rewards are permanent.
You can only recieve Tier rewards through Seasons, however you can still buy tier rewards from players.