Quote: "is the gameplay good?"
To give you a little insight, I'm the kinda gamer who will do something until he completes it just so I can say "I did it!".
Red Faction, on the PC I completed. It looked crap, played crap. The PS2 port was fairly true to the original in that the developers obviously couldn't be arsed to make something good and aparently got lazier between PC and porting to PS2.
Red Faction 2 however, is identically as crap; and the only thing that keeps myself and my mate playing it is actually the joy we get out of taking the piss out of how god damn frustrated we get trying to do something that in any other game would've been a fairly simplistic task.
Quote: "I have all of the PC ones, is there anything new in the ps2 version?"
Sometimes the console can't handle you turning to quickly and slow down. Aside from that, nope nothing really different provided you can put up with having to do pin-point precision on a controller.
Quote: "Whats wrong with it? I love the Alien Series."
I like the idea behind the AVP series, just the controls are awkward and there's nothing really new apart from a minor graphics update from the original.
Quote: "whats so bad about it?"
Bugs, Glitches, Shoot'em-up gameplay with some minor platform puzzles thrown in. It honestly was a pathetically poor cash-in which had me taking it back after a day. That's not to say I didn't complete it; but £30 for 4hrs gameplay just left me feeling ripped off given how simplistic it all was.
Quote: "while we're on the topic, how is Terminator 3: Rise of the Machines, and Gauntlet Dark Legacy? I've played them both on different systems and loved them. Can you suggest any good games?"
T3:Rise of the Machines was poor, but Gauntlet was alright.
Personally games I'd suggest checking out would be.
Snowblind, Killzone, Soul Calibur 3, TimeSplitters (entire series), Rouge Agent, Psi Ops, Kill.Switch, etc.. Some very good titles on the PS2. Problem is you need to sift through alot of crap too.