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