Collecting All Weapons - Weapon Master achievement.To 100% the game you are required to go for the good ending because by completing the Ascetic Lifestyle side quest you are rewarded with the Holy Sword, an item which is required for: Opening any golden chests before you defeat Jun and meet Sadora a second time will fail the quest and result in the bad ending.

After the quest has been completed you are allowed to retrace your steps to open all the golden chests, doing so will aggro Sadora and forcing you to kill her (The Fallen achievement), but you will still get the good ending. To get the good ending you will have to complete the Ascetic Lifestyle side quest given by Sadora the Ascetic before you confront the final boss, the quest requires you to not open any golden chest you find until you meet Sadora a second time (after defeating Jun), thus completing the quest.

Lost Ruins is a game that has three endings - the bad ending (The End achievement), the good ending (Reincarnation achievement), and the best ending which requires you to replay the game and get the good ending + complete every side quests on Veteran mode (Arrive Home achievement).

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