Here is the full list of all 30 PROVIDER achievements.
Finished Tutorial
Completed EP1: Bogland
Completed EP2: Highway
Completed EP3: Berry Field
Completed EP4: Trapland
Completed EP5: Krumb's Revolt
Completed EP6: Blue-Eye Mine
Completed EP7: Hospital
Completed EP8: Nuclear Threat
Completed EP9: Home
Completed EP10: Burn Zone
Completed EP11: Zoo
Completed EP12: BIA
Found some Fishark skin and knew how to use it
Brought old lady Teresa her sewing kit
Defeated Gary the Hampton Ghoul
Defeated John Kinin
Defeated the Fox's first test
Defeated Capital Incarnate, the Red Knight
Defeated the twisted Father Allbridge
Scared the last Palraiyuk away
Meet Terry, the weapon dealer
Meet the Junkbeast vendor
Meet Amber, the chef
Defeated, but didn't kill Abigail the Decieved Provider
Met Teresa the Berry Lady
Met Chris the Guitarist
You've completed PROVIDER
Met the Mysterious Miss Miller
Met Maria the eternal coffee lover