one thing I'm seeing right off the bat is that there's no triangles. If you're preparing this for a game ready situation don't be afraid to use triangles. For sculpting they can cause headaches but at this stage they are your friend.
The sculpt looks fairly nice. I don't know what ears looked like in Brink, but in your sculpt the anatomy on the ear is way off and kind of strange. Compare to some photos online to see what I mean. The topology is on the right track but there are a lot of problems, and honestly I feel like you will need to redo large…