Alien vs Predator 2 for the PC has been around for quite a while. And now Sierra has decided to give it's server the chop. So it looks like no more AvP2 online any more :(
"Sierra, now part of the vast Activision Blizzard group, have revealed that they are to close 21 game servers come the 1st of November. Most of the games losing online support are pretty ancient anyway, so we imagine only a few will be put out - Sierra offering no explanation for the cessation of service."
List of other games getting cut.