Everyone I know who got the student of history trophy, got 3 artifacts in the 1st week, 3 artifacts in the 2nd week, then the last 2 artifacts on the 3rd week over there 3 characters... I don't know anyone who's had the trophy pop who's earned all 8 artifacts after 3 weeks of roi being released.. so anyone who earned all 8 artifacts after 16th October hasn't had trophy pop for them :/