So i start by saying this is not something i guarantee just what worked for me.. so obviously i had finished "the taken war" quest line and "wolves of mars" quest... but after i did not receive "lost and found" quest... so here is what i did: - Made sure every mission and strike on all planets were completed and the icon was filled - Completed one house of wolves story quest and boom after handing that HOW quest in "lost and found" quest appeared after. i now have boolean gemini anyone doubting check my titan. But before i get hate this is what worked for me, hope it helps others. EDIT: My friend just did the quest "lost and found" and didn't get the exotic scout rifle and i noticed a few of you guys didn't either and he did he quests steps different which may be causing people to not receive it he didn't complete 50/50 in the 3 areas instead went into the court of oryx and defeated a boss which prompted completion of the quest even though he hadn't killed 50 enemies in each area. This could be a (POSSIBLE) cause to why people aren't getting this gun. If anyone who didn't get the gun could confirm that they didn't do the 50/50 steps would be helpful in identifying this problem.