NHL 21

This achievement is pretty easy to unlock, although a bit boring. You need to complete 10 HUT challenges. They are single player (although you can play with a friend) but it would be easiest to do the rookie challenges. The AI is absolute garbage. Each period is 2 minutes, 3 periods per game, and with such easy AI, you can score at will and make each game last way longer than 6 minutes. But once you've completed each of the 3 objectives, you can skate behind your own net and play on your phone until the timer runs out. You have to be there to manually start each period though, so it's not like you can just walk away and take a shower or something. Do this 10 times, at 6 minutes (at least) per game (minus menu and load times) and this should take about an hour and a half. But hey, you do get HUT rewards like coins and packs for doing some of these though, so might as well make the most of it,