First impressions of this game were bad. Severely hindered by the game's login system, courtesy of the police state known as EA, it took a good while for me to even get through the starting screen. However, once I did, I found my effort was worth it.
Building on the standard Battlefield concept, the two opposing teams must steadily ground down the other teams tickets, or spawns. This can be done by controlling a majority of the points of the map, or simply killing them faster than they can kill you. Beneath this simple system however, is a very tactical game. Each team of up to 32 players is divided into several squads, a handful of soldiers who can spawn on their squad leader. The squad leader can also call on the support of the commander, a single player who can call in artillery strikes, ammo drops, and so on.
Composed of several distinct classes, squads must utilise teamwork to counter enemy threats. Support gunners can lay down suppressing fire, allowing the squad to advance, as well as keeping their ammo counts steady. Medics can revive fallen squad members and heal them, engineers repair vehicles, anti tank soldiers use shoulder mounted launchers to take down tanks and APCs, and assault soldiers form the tough core of a squad. Two classes remain, Special Ops and snipers, but these two classes tend to form specialised teams, attacking behind enemy lines and destroying artillery and radar installations.
Battlefield 2 makes for some great gameplay, especially when teams co-ordinate via external applications such as Ventrilo. For a solid, large scale tactical shooter, go with Battlefield 2. This is modern warfare at its finest.