Requirements -
1. PS2/GCN, no PC or XBox.
2. Extremely good co-op
3. Split-screen co-op, no online

Extras -
1. FPS, I really would prefer it be an FPS actually
2. Maybe a little squad based, like I could spearhead an attack and my friend set up a machine gun nest or camp in a church steeple with a sniper rifle and provide cover.

I've got Splinter Cell: Chaos Theory and we both love the co-op, stayed up late last night and I think we're close to beating it. Something like SC:CT would be good too, but first FPS's like what I asked. Thanks guy, me and my friend are extremely good on teams, and we know exactly what the other person's going to do so we're deadly. So...SUGGEST AWAY! Make them good guys.

I think the Ghost Recon games are coop.

Socom?
Timesplitters 1/2/3?

Tiberium, think before you post. SOCOM has no offline co-op. Oh, and we beat TS 2/3. Good times, but we want more hard-core action. Maybe if Call of Duty: Finest Hour had offline co-op

Oh and Kirby, we tried the GR co-op (rented it) and from what we could tell you had to beat the SP levels to get them co-op..but yeah, I'll rent it next weekend and try co-op in that with him.

Continue to suggest, I like where this is going.

Brothers In Arms is fun. You get two AI teams and can tell them what to do. Splitscrean co-op and online play.

Ratchet and Clank: Deadlocked

I'm 99% postive it has offile co-op. I have the game, but I have yet to try playing with my brother (which is why the 1% lingers in my mind). But when i start it up, it has the Co-Op option, so I'm pretty sure it's there.

If you want action, THAT is the game you want.

Oh, I agree with buck. I tried it: BARRELS of fun.
I wish conker 2 was on PS2

Ya but the only problem is that I beat it in one day... So if you [anybody really] want good single player i suggest the first second or third ratchets [and there is no clank in deadlocked. IE he is there. you just don't get to play as him as in other ratchet games. [Why no clank? he kicks *** and his name isn't even teckniclally in the title! its real name is Ratchet Deadlocked]
End Rant

Tiberium: I don't want SP, I want co-op. Don't reccomend the other Ratchets to me when that's not what I want (even though they rock, <3 Agent Clank).

My friend's mom (we're like brothers) just gave me a 50$ Wal-Mart gift card, so if deadlocked is in town I shall aquire it this week.

WTF

X-Men Legends 1 and 2. Definitely. Lengthy, and excellent, plus you can probably pick up 1 for cheap.

does Serious Sam: the Next Encounter have co-op?

[QUOTE=Dj Yoshi]WTF

X-Men Legends 1 and 2. Definitely. Lengthy, and excellent, plus you can probably pick up 1 for cheap.[/QUOTE]

Aye. Great games right there.

Lego Star Wars. XD It has co-op!

You know, I think it does.

We've played SS, had a kickass time, but after about our 10th play through we got tired of all the enemies.

Oh, we've done Lego Star Wars too. Awesome game

Best co-op game I've played recently was Mortal Kombat: Shaolin Monks. Seriously fun game to play with a friend. Best side-scrolling beat'em-up since Double Dragon.

The demo was most certainly excellent.

X-Men Legends!

Ok, Ratchet Deadlocked and X-Men Legends. Will buy them, but keep reccomending.

Conflict Desert Storm 1/2 have co-op. I think it's up to four players on the GCN. Anyway, they're squad based but not FPS (played from third person).

Oh man...I was waiting for someone to reccomend C: DS 1 and 2. I sold one once we beat it, but man...HOURS upon HOURS of fun. We had it down to an ART.