Baldr Sky Walkthrough

Only the choices listed here should affect which ending you get. I played the game some years ago and this is written from my memory, so I'm really sorry if it contains mistakes in it. I haven't gone through the English version so if someone wants to fix the choices/provide me with the proper English ones so I can do it myself would be nice. Or if someone just feels like writing a better guide than this is that'd also be nice. I tried to make this contain as little spoilers as possible. Anyway:

Every time you clear a route be sure to save and load that save when going for the next route. Be sure to use a save from the good ending of every route since that'll unlock the epilogue and scenario jump. I think scenario jump unlocks by beating the last route regardless, but anyway.

Rain Route
Rain Chapter 10	||Clear the timed gameplay section without taking too long (otherwise you will be locked out of the good ending)||
Good Ending
Rain Chapter 12 ||Choose not to give up||
Normal Ending
Rain Chapter 12 ||Choose to give up||
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Nanoha Route
Chapter 4 ||Choose to contact Aki||-> Leads to Nanoha's route
Good Ending
Nanoha Chapter 12 ||Beat the timed event at stage 3 or lower||
Nanoha Chapter 13 ||Defeat the final boss||
Normal Ending
Nanoha Chapter 12 ||Beat the timed event at stage 4-5 *this means clearing the battle before Gilbert while somewhere between 3:00-3:44 having passed. This is the fight where the miko will warn you that you need to hurry after a while. I don't think it is necessary to check the situation in the real world to get this ending, but you might want to do that to make sure.||
Nanoha Chapter 13 ||Defeat the final boss||
Bad Ending
Nanoha Chapter 13 ||Lose against the final boss||
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Chinatsu Route
Chapter 1 ||Choose "Rain..."|| Enters Chinatsu's route
Chapter 4 ||Choose "Fine". Otherwise you will be sent back to Rain's route||
Good Ending
Chinatsu Chapter 14 ||Choose to believe the agent, defeat the final boss||
Normal Ending
Chinatsu Chapter 14 ||Lose against the final boss||
Bad Ending
Chinatsu Chapter 14 ||Choose not to believe the agent||
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Aki Route
Follow Chinatsu's route and pick choices relating to Aki in chapters 5-6 to get on the route
Good Ending
Aki Chapter 10 ||Beat the timed event within the limit and choose to investigate further *this leads to the true Aki route branch (required for the good ending), missing the time limit leads to normal branch||
Aki Chapter 12 ||Choose to accept Aki *choosing not to gives normal end||
Aki Chapter 13 ||Don't lose any fights *the one with regenerating HP doesn't matter||
Normal Ending
From the true branch
Aki Chapter 10 ||Beat the timed event within the limit and choose to investigate further||
Aki Chapter 12 ||Choose not to accept Aki||
Aki Chapter 13 ||Don't lose any fights *the one with regenerating HP doesn't matter||
From the normal branch
Aki Chapter 10 ||Don't beat the timed event within the limit||
Aki Chapter 12 ||Choice doesn't matter I think||
Aki chapter 13 ||Don't lose any of the fights||
Bad Ending
Aki Chapter 13 ||Lose the fight where you have to defend Aki with Eiji (possible in both branches), or lose the final battle of the normal branch||
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After clearing Aki's route you need to play Reminiscence from the main menu
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Makoto Route
Chapter 1 ||Take the new choice|| Enters Makoto's route
Good Ending
Makoto Chapter 13 ||Defeat the final boss||
Normal Ending
Makoto Chapter 13 ||Lose to the final boss||
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Sora Route
Do not lose/time out any of the boss battles through chapters 2-5
Chapter 1 ||Take the new choice|| Enters Sora's route
Good Ending *I would personally heavily recommend playing this first, as the normal ending is kind of just a stub version of this
Sora Chapter 11 ||Ask Kuu if she's jealous||
Sora Chapter 11 ||Beat the boss fight||
Normal Ending
Don't do one of the things listed above for chapter 11
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True Ending/Epilogue/+
After clearing the game you get two new plugins. Activate both of them. In chapter 11 there's a scene with a new choice now. If you look at the scenario chart it's pretty easy to see which node. After that reach the ending again. With the scenario jump you should be able to just choose the final node of Sora's good end branch and get the true epilogue.