Set foot on AR-Y 26 for the first time. I guess that counts as an achievement?

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You Should Check Her State

Fully upgrade a primary weapon

Revive a total of 100 players

Win 100 matches

Down an enemy with a gadget while looking away from them

Down 4 enemies in one round

Win a match without purchasing a primary weapon

Accrue a total of $70000 in a single match.

Purchase 3 perks in a single match

Down an enemy while you have less than 10% health

Win 8 matches with 8 different characters