Bonuses are passive perks that activate when a hero is slotted into the squad bonus slots. The left icon indicates a Support hero and the right icon indicates a Tactical hero. Slotting them in the correct slot is important because tactical bonuses don't activate if the hero is slotted in the support slot and vice versa. While most heroes only have a support or tactical bonus, some heroes have multiple bonuses available ie: Urban Assault Soldier has Improved Headshots as a support bonus and Lucky Stars as a Tactical bonus. Matching the correct bonuses for your Primary hero slot is important in achieving victory and is another key feature that helps customize gameplay. Note that tactical bonuses require the slotted hero to at least be two-stars for it to activate.
Hero Star Level[]
In addition to the raw stat bonuses that the squad bonus slots provide, the tier level of the slotted hero also improves the bonuses. How much this bonus increases per additional star varies between each perk with some having no difference between tiers.
List of Bonuses[]
Note that the following effects are for the baseline hero and does not include most of the upgraded effects. Different heroes may share the same bonus effect but heroes with the same subclass will share the same bonus effect ie: Assassin Sarah and the Limited Edition Assassin Ken both provide the Endurance Training bonus. Generally speaking, bonuses support their shared class specialty more than anything else ie: Outlander bonuses tend to be helpful for harvesting or treasure finding while Ninja bonuses tend to be about melee combat, though there are exceptions to this rule ie: Commando Soldier's passive is for Outlanders.