After a long talk and the decision of Rockstars creative director Dan Houser, GTA San Andreas will not have online play for the PS2 Version. The expulsion of the online play for PS2, almost definitely takes out the possibility of it being implemented in the Xbox and PC versions, which will probably appear at 2005.
Speaking in an interview with Dutch games magazine Power Unlimited, Houser categorically stated that "San Andreas will not be online," going on to explain that "we would have to sacrifice too much for it."
"We have a lot of script writers working on GTA, and they use so many scenarios to build the story - its impossible to do that in an online game, that problem has not been solved," he explained. Quoted from Dan Houser.
News source: gamesindustry.biz