Here is the full list of all 27 OXENFREE II: Lost Signals achievements.
"Finally...Planetshine."
Don't pet Athena.
Place the transmitter at Garland.
Prevent Olivia from tuning the portal and smash her radio.
Prevent Olivia from tuning the portal in any way.
Place the transmitter at Charity Point.
Place the transmitter at Tootega Falls.
Find out the secret at Jacob's House.
Become friendly with Charlie.
Become friendly with Violet.
Become friendly with Olivia.
"...accept what you find."
"...the apex of my accomplishment."
Discover the complete Adler Letters Set 1.
Discover the complete Adler Letters Set 2.
Discover the complete Adler Letters Set 3.
Discover the complete Adler Letters Set 4.
Discover all Adler letters.
Check in with Evelyn for all three transmitters.
Save Shelley.
Deliver the shoe to Hank.
Finish Nick’s journey.
Hear Maria tell Charlie she has a crush on him.
Talk to a young radio enthusiast.
Pet Athena.
Create the scariest One Word Story.
Agree to be a special kind of friends.