Steam lists this as "Jump the crazy chasm in the woods." Early on you can reach a large gap in the forest and take the running jump across it rather than going around. Make the leap and the achievement unlocks. It is a small optional bit of platforming, so if you miss it on a first pass you can return on a later walk through the woods.
The Steam description is simply "Complete the story." Play through to any of Oxenfree's endings and this unlocks - the specific ending you get does not matter for this one. It is effectively the completion achievement, so you will earn it naturally on your first finish.
This is a hidden achievement with no Steam description, tied to one of Oxenfree's several branching endings / epilogue outcomes. The exact set of choices that produces it is not verified here, so rather than guess a trigger, treat it as an ending-variant achievement and follow a spoiler-aware endings guide if you are targeting it. New Game Plus makes it easier to steer toward a particular ending on a repeat run.
A hidden achievement with no Steam description. It is tied to a relationship subplot resolved through your dialogue choices over the course of the story. The precise choices are not verified here, so to avoid inventing a trigger, follow a spoiler-aware choices guide if you want to line this up deliberately. It is a good candidate for a second, choice-focused playthrough.
Maggie Adler's letters are collectible notes scattered across the island. This unlocks once you have picked up 4 of them. Explore side paths and beaches thoroughly and interact with letters when Alex spots them - they are easy to walk past, so check the map's out-of-the-way spots. If you are letter-hunting, a collectible-location community guide is the reliable way to find every one.
A hidden achievement with no Steam description, and by its title it appears to be the counterpart to the more positive relationship outcome - the result of choices that keep two characters apart. The exact dialogue path is not verified here, so use a spoiler-aware choices guide if you are chasing it deliberately. Because it opposes another choice-based achievement, plan to earn the two on separate runs.
The mid-tier collectible milestone: reach 8 of Maggie Adler's letters. Keep exploring every branch of the island and reading letters as you find them. Because a single playthrough may not naturally surface all of them, this often completes alongside the full-collection push - consult a letter-location guide if your count is stalling.
Steam describes this as "Slap Ren in the face." At a certain point a dialogue prompt lets Alex slap her friend Ren; choose it and the achievement unlocks. If you are avoiding it to be nice, remember you can always pick the aggressive option on a later playthrough.
Collect every one of Maggie Adler's letters. Missing even one leaves this locked, and some are tucked down optional paths you may not revisit, so many players finish this with the help of a collectible-location guide and/or a New Game Plus run where remembered locations make the sweep quick. Grab each letter as soon as you see it rather than backtracking later.
A hidden achievement with no Steam description. The title points to one of the game's family / sibling relationship threads being resolved a particular way through your choices. The specific trigger is not verified here, so treat it as a choice-driven story achievement and consult a spoiler-aware guide if it is a target. Save it for a deliberate choices-focused playthrough.
The description is "Find all hidden frequencies." Throughout the island there are spots where tuning Alex's radio to a specific station triggers a hidden signal, ghost transmission, or time anomaly. Use the radio at points of interest and slowly rotate the dial until something responds. Finding every one across the whole map usually means working from a frequency-location list, since several are easy to miss.
Steam lists this as "Make enemies with all of your friends." Across the game, consistently choose the coldest, most antagonistic dialogue option toward each character so that you end up on bad terms with all of them. Because it depends on your cumulative choices over a whole run, it pairs well with a dedicated "mean" playthrough. The exact per-character thresholds are not spelled out by Steam, so if it does not trigger, a community guide covering the key relationship choices is the safest reference.
A hidden achievement with no Steam description. Oxenfree lets you decline to respond in conversations by simply not choosing a dialogue bubble, and the title strongly suggests completing the game while staying silent. The exact requirement - whether it is total silence or below some threshold of chosen lines - is not verified here, so if you want it, follow a community guide's silent-run instructions closely, since letting timed dialogue prompts expire on purpose across an entire run takes patience.
