Here is the full list of all 27 OXENFREE II: Lost Signals achievements.
Become friendly with Charlie.
Become friendly with Violet.
"Finally...Planetshine."
Pet Athena.
Check in with Evelyn for all three transmitters.
Place the transmitter at Garland.
Deliver the shoe to Hank.
Save Shelley.
Place the transmitter at Charity Point.
Place the transmitter at Tootega Falls.
Prevent Olivia from tuning the portal in any way.
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."
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.
Finish Nick’s journey.
Hear Maria tell Charlie she has a crush on him.
Talk to a young radio enthusiast.
Don't pet Athena.
Create the scariest One Word Story.
Agree to be a special kind of friends.