It didn't take long for EA and DICE to turn out Battlefield 2: Special Forces, the expansion to this year's smash online action game. And judging from the teething problems that the expansion is having, it looks like EA and DICE Canada (the developer of Special Forces) didn't take long enough. That's because Special Forces is an excellent expansion that delivers more of the intense online combat that fans of Battlefield 2 adore, but it's also crippled by some potentially showstopping bugs. If you can get it running, though, you're in for a great time.

The ATV is but one of the new vehicles in the expansion, but rest assured, there's a lot of infantry combat in it.

There's some really great new content in Special Forces that builds on the strengths of Battlefield 2. Special Forces adds a total of eight new maps, including a spaceport complete with a launching pad and rocket, gutted-out cities, an airfield, and an island. All these maps have an infantry-heavy focus, even on their larger, 64-player variants, and that's good news to Battlefield 2 fans, since the most popular levels in the core game are the urban ones, such as Strike at Karkand. The other good news is that the expansion features a number of urban levels similar to Karand and Sharqi Peninsula. In fact, they may be a bit too familiar, as there are some buildings and objects recycled from the core game. Still, there's enough new content in the levels to differentiate them from their predecessors and to provide more urban playgrounds to romp around in. For example, there's a palace level in which one side has to battle through a city to the palace's gates and then into the palace itself, which provides a large mix of indoor and outdoor combat. Yet perhaps the best new map is a reverse amphibious assault, in which the Middle Eastern Coalition forces must board and take over a US aircraft carrier defended by Navy SEALs; the action takes place on the carrier's deck, in its vast hangar bays, and in its corridors and rooms below.

Meanwhile, there are six new factions in the expansion, which is a big number considering that Battlefield 2 itself only shipped with three. These new factions are needed to justify the scenarios (for example, Russian special forces versus an insurgent group, or British SAS versus a different type of rebel group), though one of the disadvantages of having six factions and only eight maps is that you see factions only once or twice throughout the game. You still can't mix and match factions and maps to create different face-offs (DICE says this is for balance purposes), so it seems like you get to see your favorite new faction on only a couple of occasions. Then again, the factions are all fairly interchangeable to begin with, since they feature similar weapons and vehicles.

Even though we're dealing with Special Forces in this expansion, each faction is broken down into the same classes as the conventional factions in Battlefield 2. So each faction has a special forces class armed with a carbine and plastic explosives, a support class that carries a light machine gun and can drop ammo packs, an antitank class that carries a submachine gun and a tank-killing weapon (there's even a new RPG!), and so on. Speaking of the new RPG, there are a slew of new weapons to round out the arsenals, though for the most part these simply feel like cousins of existing Battlefield 2 weapons. For example, there's a new British assault rifle that has a grenade launcher attached, and a new SEAL carbine with a scope, and they operate just like the weapons in Battlefield 2. The major additions to the game are new toys that you get to play with that you didn't have access to before. These include the grappling hook, zip line, and flashbang and tear-gas grenades.

Grappling hooks give you and your teammates the ability to scale buildings.

The grappling hook and zip line provide a whole new level of mobility to infantry, and now you can haul yourself up to a previously inaccessible rooftop or perhaps bypass a heavily defended stairwell by climbing up the side. Since you carry either a hook or a zip line, you'll need to work together with your team if you really want to exploit these new capabilities. These new items are balanced well so they're useful without being overpowered. For example, climbing up the rope is a slow process (just like it was in gym class), so you're completely exposed to anyone passing by who wants to take a few free shots at you. Meanwhile, zipping down the line can also leave you a sitting duck if you're not careful. The new grenade types are a bit too much, though, and they're already being overused in matches. For example, you can carry up to four flashbang grenades, and they're being tossed left and right in some matches. As you'd expect, these can temporarily blind you and make you pretty helpless. Then there are the tear-gas grenades that make your vision swim like you're in a drug-induced daze. Tear gas can easily be countered by a gas mask, which limits your stamina due to the difficulty of breathing through it, but the thick, yellowish clouds are still useful for providing concealment, and because of that, thick, yellowish clouds appear in any contested area now.