You’ve been rather busy in Act Two of Stray Gods: The Roleplaying Musical and have just learned that Pan gave Calliope’s destination up to Medusa. Now, Grace will have to not only fend off Athena when she summons her to Olympus to check in, but double back in her search: you’re going back to The Reliquary.
Apollo or Persephone think Grace may be able to trigger Calliope’s memories from the night she was killed by following in her footsteps, so you head back to The Reliquary to try – but as they say, even the best-laid plans can sometimes go astray.
This guide contains major spoilers for Stray Gods: The Roleplaying Musical.
Athena And Your Second Trait
When you first go back to Grace's Apartment, you'll find Hermes waiting for you there, on orders to bring Grace to Athena. Speak to Hermes if you'd like, and then select "Let's go" when you're ready for them to bring you to Athena.
However, before you go, Hermes tells you they feel you've changed since they first met you, and it's this comment that brings you to choosing Grace's secondary trait.
With so much coming at you in the game's finale, you're able to choose a second trait from the remainder that you didn't choose in Act One when deciding Grace's nature.
You'll have seen a bit about what the other traits offer by the dialogue choices you weren't able to make, so choose a second trait to pair with your original heading into the finale.
When it comes to the achievements and trophies for Stray Gods, though, your trait-related achievement seems primarily related to your first-choice trait.
Athena's Office
After you've decided, you're brought over to Athena's Office at Olympus, and she wastes no time chastising you, since she knows you went to The Reliquary, and that you brought Freddie.
Choose any of the comments in response to Athena here, and you'll soon be able to ask her about Medusa. If you're aiming to turn Medusa in, you can tell Athena that Medusa tried to eat you.
Doing so unlocks the "Not Taking Any Chances" achievement or trophy.
Don't mention Medusa trying to eat you at any point, though, if you're trying to save Medusa. Your decision on what to tell Athena decides Medusa's outcome at the end of the game.
Athena reveals that the Idols are dying out, and that she'll do anything to prevent it. You're then able to ask her about Medusa, Pan, or The Reliquary before leaving her office by choosing, "I'll go."
Check In At Home
Back at Grace's Apartment, the god you sided with in Act One will be present with Freddie, trying to talk to Grace about the discussion with Athena, offering background info on Athena in the process.
They then tell you to head back to The Reliquary, to try to follow Calliope's footsteps - if Grace experiences something special to Calliope, Grace might trigger Calliope's memories and learn what happened to her that way.
Ask your god the questions on screen to learn what you'll be doing to try to find a memory, but ultimately, select "Okay, let's do this," when you're ready to go. The God you sided with can't come with you, but they tell you they'll be nearby.
Return To The Reliquary
As soon as you've finished conversing with either Apollo or Persephone, you'll be automatically brought back to The Reliquary, and you're given three choices for how to get in: be honest with Hecate about why you're there, have Freddie distract Hecate while Grace breaks in, or sneak in the back way that Asterion mentioned earlier.
Regardless of which choice you make, Grace ends up inside The Reliquary, possibly with Freddie in tow if she isn't busy with Hecate. Before long, you'll run into Asterion, who's already been alerted to you breaking in.
Your answer here depends on what exactly happens, but either way, Grace ends up alone in The Reliquary without either Freddie or Asterion.
The Mirror And The Furies
Once by herself, Grace has memories of Calliope at The Reliquary which guide her toward a display of legendary items of myth on display within. Look at a few things from the menu presented, and before long, you'll have the option to look at the mirror.
When you do, though, three beings appear behind Grace - they're The Furies, and the massive knives they're carrying imply they're not here to talk. Regardless of which dialogue choices you make as Grace, it leads to Grace running from The Furies.
After a bit of fruitless fleeing, you bump into Freddie also running through the halls. The sudden company doesn't interrupt them, though, and Freddie is stabbed before The Furies wordlessly vanish.
Hecate and either Apollo or Persephone find Grace, and Hecate tells you about The Furies - that they don't stop pursuing until a debt is paid.
She knows you used the mirror, and mentions The Fates. Choose any dialogue options here, and the scene ends after the god you sided with helps Grace leave The Reliquary.