Paint a weapon at the Mod Bench

Get 5 stars for a Score in any mission

Precision Kill a Biker to send him over the handle bars

Greet 10 citizens

Get Astro stuck to your face underwater

Heal by sleeping for the first time.

Complete your first structure (signs, ladders, and climbing anchors also count.)

Give your first Like.

Deliver your first piece of lost cargo.

Discover what happened to NERO

Upgrade either your Health, Stamina, or Focus for the first time

Get out of Crazy Willie's

Acquire 6 or more friendly Stalkers at the same time in the Campaign