Guildwars,factions,nightf... whats the difference?
so far guildwars has realesed 3 different types of guildwars
guildwars(also known as guildwars prophicies)
guildwars:factions
guidwars:nightfall

are they 3 seperate games or are the 2 newer ones patches or
expansions? if they are totally different then, can someone

from an older version play with a person from a newer version?
thanks.

Additional Details

5 months ago
because ive been thinking that i maybe might buy guildwars and want to
know which version is the best and if you need the

older versions to play the newest one.
http://www.ro-ragnarok-online.com
http://www.worldofwarcraft2.co.uk
http://www.buy-kamas.com
http://www.ragnarokonline.cc
http://www.buy-gil.com
http://rs2-gold.com
http://www.buy-rs-gold.com