Oxenfree
13 Achievements
1,000
12-14h
New Beginnings
Jonas is your new step-brother. Details for this achievement will be revealed once unlocked
40
15.27%
How to unlock the New Beginnings achievement in Oxenfree - Definitive Guide
VERY IMPORTANT: This achievement won't unlock if you meet the requirements for "Thicker than water" at the same time. More info inside the spoiler tag.
Beware of spoilers.
If you meet these requirements, you'll obtain the achievement during the "stat count" before the credits.
For a guide on how to get all the ending achievements in the lowest number of playthroughs, click here
This is not a real solution, it's just a tip for those who - like me - enjoyed the first playtrough and ended up with Michael as brother: by KylKo's walkthrough you need 3 runs to get all the achievements, one for (almost) everything the Jonas ending, one for making everybody hate you and one for not saying a word during the whole game (x2 Michael ending).
You can avoid to start a 4th playtrough only to get the "New Beginning" achievement just by going offline right before the final "boat scene", when Michael ask you about what to do.
Complete the game as you would normally do and go past the credits, then go to Manage Game Data and delete your savefile.
At this point go back online and any achievement you eventually unlocked by completing the game (like, in my case, "The Strong, Silent Type" for not saying a word during the whole playthrough and "You'd Just End Up Hating Each Other.") will pop up, then start the game: your last savefile will be downloaded from MS Servers :D
This time, tell Michael to leave to unlock the "New Beginnings" achievement and save a run ;)
"Thicker than Water"
See details below in the spoiler section.
Refer back to "Thicker Than Water" and do the exact opposite. Basically, make sure Michael leaves town with Clarissa or goes to school if they broke up so that he dies in the past during his going away party, then Jonas becomes your step-brother in the present (rather than Michael coming back to life).
This trophy must be obtained during your nice playthrough, as the mean playthrough requires you to go for Thicker than Water and your silent playthrough will give you that same ending by default. Basically, just be nice to Jonas. Take him with you whenever possible, say you're glad he's joining the family, listen to his stories, etc.