Moving Forward Trophy in Solar Ash
Destroy the Starseed and free Echo
How to unlock Moving ForwardThis will be one of the two endings available in the game, but don't worry, you won't have to play through the game twice to get both. After you've defeated the Remnants and powered up the Starseed, make your way to the Crater. Speak with Cyd and choose the "deactivate" option. Leave the conversation and skate on the central rail leading to the top of the Starseed. Interact with the device at the top and when given the option to "Activate" or "Destroy" the Starseed (this will be after your initial "Activate" cue), choose to Destroy it. This will cause you to have to complete one more fight before the game ends.
As with the Remnant fights, this final one will consist of 3 phases. You need to wait for her to stab her wires into the ground, then grapple onto the one that's marked. The next will be just as you did before; hit the markers before the time runs out. After you've removed all 3 wires, the game will end and the trophy will unlock.
If you're having any trouble, please see VoidSprinter for a video that includes all of the Remnant fights.
To get the other ending (Moving Forward ), just reload your save file from the main menu and it'll start you at the bottom of the Starseed.