Fiefdom: A fiefdom is an estate of land, especially one held on condition of feudal service. It's like being given specific areas in your online game as rewards for your services.
Knighthood: Knighthood refers to being granted honorary title of knight by a monarch or other political leader for service to the monarch or country, especially in a military capacity. It's like being given a special status in your gaming team for your exceptional performance.
Suzerainty: Suzerainty is a situation where a region or people is a tributary to a more powerful entity which controls its foreign affairs while allowing the tributary vassal state internal autonomy. It's like when your gaming team becomes part of an alliance led by another stronger team.