In an announcement on the Sierra Community Forums, Sierra/Vivendi listed 21 game servers that will be taken down on November 1. Some of the games date back to 1998, spanning all the way to 2006.
No specific reasons for this move were mentioned in the forum post. According to Shacknews, these servers will still retain their multiplayer functions but no longer allow server browsing or other additional community features, such as Tribes 2's clan support. Players will need to use direct IP connections or third party server browsing software if they want to keep playing online. Local multiplayer functions will remain unaffected.
Here is the list of servers from the original forum announcement:
Alien vs Predator 2ArcanumCaesar IVDark Reign 2Emperor: Rise of the Middle KingdomEmpire EarthEmpire Earth 2Empire Earth: Age of ConquestGround ControlGround Control2HomeworldHomeworld: CataclysmNolf 2Red BaronSanityStar Trek: ArmadaSWAT3: EESWAT3: GOTYThe Incredible MachineTribes 2Vampire
