Your primary gameplay loop involves refilling the G.A.I.A. through various marks (mini-goals) while building relationships to unlock "special encounters" and dream sequences.
💡 To reach the "Filled To The Brim" achievement, you must reach the final mark on the G.A.I.A. system. A.I.A. puzzles ? LAST HOPE V19.2 | Pc Game | Opening and Gameplay #35 Last Hope [v19.2] By Poolside Games
You can download the comprehensive 31-page Kilroy's Guide to Last Hope on the Steam Community , which covers item locations (like wine), seduction routes, and how to obtain "Matter". Your primary gameplay loop involves refilling the G