UHH2 - 152 valid achievements, 17 valid games. Don't think I'll be participating.
Earn a Mythic Boss Takedown in a Warzone Firefight match. - Halo 5: Guardians
Complete a Warzone Firefight match on 6 unique maps. - Halo 5: Guardians
Successfully complete 5 Warzone Firefight matches. - Halo 5: Guardians
96/5,36275/1,25010/60
2,475/2,7021,535/1,62565/69
3,494/4,013950/1,00034/35