WoW player's guide to GW: Guilds
Amazingly enough, a game called Guild Wars does focus heavily on guilds. You can not only have 100+ players in each guild, but your guilds can join together to form alliances. These alliances can combine forces to take over towns through PvP combat and get their banner flying high above the city walls. Guilds are also involved in intricate guild vs guild battles which is highly supported by ArenaNet with annual tournaments for real-world prizes.
The guild infrastructure in GW is made up of a leader, officers and members which all have their own set of restrictions on recruitment, promotion and demotion privileges. Guilds can have their own Guild Halls, where players can instantly travel for meetings, GvG set-up and merchant interaction. Sadly, GW guilds do not have a sharable guild bank, as in WoW. While the distinction of a guild in WoW consists of the guild name under the players name above their character's head, in GW they have guild tags and guild capes. The guild tag is a short 4-max-character abbreviation for the guild, and the cape is much like the tabard for WoW, but worn on the back and much more visible and customizable.