Castor, EVE Online's 1st official expansion
Release date: December 18, 2003
Castor was the first major content addition. It focused on refining current functions along with adding "Tech 2" elite components and ships. With its release, Eve players saw conquerable stations in 0.0 (deep space) security systems, the introduction of the agent mission running system, the introduction of research agents, and many other features released between the launch of Castor and its follower, Exodus.