Unlocking World Tier 1 in The Division 2
There are three specialists that you can unlock for the endgame – Demolitionist, Survivalist, and Sharpshooter. You need to do a bit of legwork to unlock them, so the steps are as follows:
Reach level 30.
Complete the three strongholds. It’s best to do them in order – District Union Arena, Roosevelt Island, and Capitol Building
Once these three are completed, you’ll be ranked “World Tier 1”.
Head back to the White House. Look behind the Quartermaster to see the new “Specializations” desk.
World Tiers 2, 3, & 4
To advance beyond World Tier 1 and get better equipment/skills, you’ll need to complete some more missions, with a twist – The Black Tusk faction, introduced in a cutscene as you begin the endgame, have now invaded and taken over the Strongholds. So to get further up the tiers, you’ll need to do the following for each stage:
World Tiers 2, 3, & 4 Complete “Invaded” versions of the missions “Grand Washington Hotel” and “Jefferson Trade Center”. You’ll need to do this for each World Tier. Accumulate the “Gear Score” requirement to advance World Tier. Then complete the Stronghold missions again for each Tier to unlock the next one.
World Tier 5
Unlock the chance to go into “Tidal Basin” when it is released by completing “Roosevelt Island” and “Capitol Building” Strongholds in World Tier 4.
Note that World Tier 5 Stronghold “Tidal Basin” is not currently accessible as the last stronghold on the map isn’t currently available, but keep an eye on it as it will appear at some point.