Complete 15 games as heroes NOT in your top 3 most played (All Modes).
So my top take away here is, they added “(All Modes)”. Is Arcade “NOT” a mode? Why say “All Modes” if arcade is not an option? Unless, it is not considered a mode?
Point is, I am not getting ANY points towards this challenge in Arcade… So either Arcade is NOT a mode or the challenge is NOT “Any Mode”.