特徴 -Alien Swarm is being released for free by Valve. Alien Swarmは無料です。提供はvalve -リスト -リスト Is a tactical, 4 player co-op action game with a top-down perspective. 見下ろし型タクティカル4人co-opアクション Complete game code and mod tools available to the community. ゲームコードとModツールが提供される。 The SDK is separate from that of other Source games. Features 4 unique classes. 4種類のクラス Over 40 weapons and equipment with many configurations. 武器と装備は40種以上 8 unique characters. 8人のキャラクター Has Easy, Normal, Hard, and Insane difficulties. 難易度は「Easy(易)」「Nomal(中)」「Hard(難)」「Insane(狂)」 Features only Campaign Mode and Offline Practice Mode. Uses L4D2 style add-on system for custom campaigns. Much less randomization than L4D so players can observe, learn, and overcome challenges. Uses a modified Source engine between the L4D2 and Portal 2 iterations. Supports dedicated and listen servers. Contains Valve game easter eggs. 64 achievements Does not currently support Mac or controllers.