Kill 10 Engineers. - Halo: The Master Chief Collection
H3: ODST: Find the 9th Audio Log. - Halo: The Master Chief Collection
H3: ODST: Find the 8th Audio Log. - Halo: The Master Chief Collection
7,673/25,5182,965/7,000331/700
49/9,95345/1,2505/71
48/9,04745/1,0003/48