Greatest online competitive game ever!
SOCOM has great online multiplayer witch is its biggest feature. SOCOM also has a campaign to, and it is comprised of 12 missions from different areas of operation. Each mission has you gathering intel or capturing enemies, and using stealth to kill your enemies, or make them surrender. The AI in this game is very good, and on high difficulties, they can be hard to get by. Also once and a while the AI may seem clunky. The campaign has you going through each mission with 4 seals and you can utilize the USB PS2 headset to communicate with your squadmates and give commands, but can get frustrating trying to use it, so i suggest not to use it for the campaign.
Then is the biggest feature, the online multiplayer. You can play on one of two team, Terrorists or SEALs. The game is 16v16 and has around 12 maps which are all unique in their design and are completely different. The game allows online chat between teammates. There are different types of gametypes like Suppression where the first team to eliminate the other team wins, and Extract where the seals have to rescue hostages, demolition is where both teams go after one satchel placed in the center then plant it at the opposite teams base.
There are still about 30 - 70 people online to this day if you still want to check it out. The only bad thing is that peopl could always just go on and use gameshark and ruin the fun for everyone.