The FPS considered to have the best online multiplayer by many critics is Call of Duty. It has many different game modes like HeadQuarters, Domination, Team Deathmatch, Free-For-All. Also, it is more organized and the stats are fun to compare with other people.
If you are looking for FPS with great campaign modes Fallout 3 is a good option. Halo also has a good campaign but that is only for Xbox 360.
Halo 2
Team fortress 2
Yes, probably the best FPS game right now..
the best fps in my opinion is called halo trial you get campaign and multiplayer also you can download really cool mods you get the game at download.com get on the Internet and try it out the game is really fun
online multiplayer
The best online multiplayer game if you are willing to buy a game that isn't the nerdy World Of Warcraft. Also Starcaft are nice. If you like FPS then go for Call of Duty series. And Team Fortress 2 if you play on PC. Many other good games are out there.
you have to pay for wow.... Try wolfteam an uber online multiplayer game made by softynx copied by modern warfare and counter strike! AND ITS FREE
It is multiplayer online but not split screen.
Here is a short list of good multiplayer games:runescapewizard 101clubpenguinspineworldbinweevelshabbo hotelguild warsThere is also a link in related links to a site that has a list of free online multiplayer games.
it is multiplayer both in split-screen and online hance warhawk online.
No, unfortunately it's a Multiplayer FPS. It's also a mod of half life.
I find a reasonable game (It is hard to find a great online FPS without downloading) to be a game called Russia's Army. It has 8 player online with a selection of weapons and a nickname. You can find it here: http://www.gamevial.com/russiasarmy.htm