I have 10 teams, but 9 of them need to be purchased with currency(Containment points) you earn in the game. You start as a D-Class, but once you buy one of the other teams, you’ll spawn in a room that’s not class from now on the room has four buttons corresponding to the branches of the teams. Selecting a button assigns you to the highest unlocked level within that branch.
For example, if you select the “Researcher” branch and you’ve unlocked levels 1 and 2, it will make you a level 2 Researcher. However, if you’ve only unlocked level 1, you’ll become a level 1 Researcher. If you press a button for a branch you haven’t unlocked yet, a popup will appear showing the page where you can purchase access to that branch