A detailed achievement guide and walkthrough to get you your 100% as quickly and effortlessly as possible. Step-by-step instructions. Introduction Estimated difficulty: 2/10 Estimated 100% time: TBD. Probably 3-4 hours if you follow the walkthrough Offline/online achievements: 16 offline / 0 online Number of playthroughs: 1 Glitched achievements: 1 possibly. CRYSTAL HUNT! Missable Achievements: 6….