Some very interesting news has arose from GTASanAndreas.net, according to Games magazine there may well be a secret two player mode, here is a quote from the mag:
In Las Venturas, all of the expected elements are in place, just not necessarily authentically. As you enter the city's strip, you're greeted with an abundance of flashing lights and casinos with pink flamingos. Of the three cities in the game, Las Venturas is without a doubt the most graphically impressive and by far the most immediately stunning.
There's so much more to be revealed - There's even talk of a top-secret two-player mode.
- GamesTM Issue 24
So there you go, just imagine it, it seems a plausible idea after hearing of driving schools and boating schools. Rockstar did confirm it wouldn't be multiplayer, yes. But a top secret two player mode is certainly not out of the equation.
(Multi Theft Auto wasn't developed, published, or endorsed by R* Games or R* North)
Yeah, I realize its a posibilty. But with such a complex and enormous game, would the PS2 even be able to handle the specs needed to power a multiplayer GTA? And what would you do in it?
The talk of a top secret two-player mode is probably just that-- Talk. Don't get your hopes up. R* has already said that there will be no multiplayer. And I don't think they'd try making a co-op mode, what with all the things already put in the game, like eating etc.