this achievement takes a lot of dedication, but it'll be so worth it! first, you'll need to finish the story. meaning you have to successfully escape ten times. once you've done that, persephone will finally come home to the house of hades!! you can start bonding with her and unlocking more dialogue.
keep chatting with persephone and hades after each run. you'll start talking about the olympian gods and what might happen if they find out the whole truth. this will unlock the prophecy "the queen's plan," which means you'll need to get closer to the olympian gods. once you complete that prophecy, it will trigger "family reunion!"
this one's super simple. you just need to invite all the olympian gods to a big feast! you can find them during your runs, or use a little trick: equip their keepsake, start a run, grab their boon to invite them, then just kill yourself in the encounter. repeat for all 9 gods, and you're done! (this will also help you rank up your keepsakes for the "friends forever" achievement!)
once everyone’s been invited, just talk to persephone and hades back home, and boom! feast time! the epilogue will play, and the achievement is yours! 🎀