HUT rush is an all-new, fast paced, instant reward mode in Hockey Ultimate Team.
The 'Tiers' correspond to a weekly progression system in which you earn score by winning and also completing uniquely themed events.
It won't take you long to reach Tier 10. If you play 3v3 for example, a lot of the time there are money pucks and games that will end under a minute and you'll earn thousands of points. You can play offline or online but if you have some NHL video game experience I recommend giving online a try.
You will see that there are also mini objectives you can work on such as, 'completing one-hand dekes", These give you a huge bonus of points to help towards Tier 10 if you can earn them.
Takes about 1-2 max to get enough points for this achievement. If you lose, don't quit out or you will earn nothing.