Alien Swarm: Reactive Drop

You command a squad of marines sent into facilities overrun by alien creatures. Missions combine fighting through hostile areas with completing objectives under pressure.

Shoot from a top-down perspective while coordinating with teammates in co-op for up to eight players, or play solo with AI squadmates. Marine classes bring different roles, and friendly fire makes positioning and communication important.

Hack terminals, weld doors, and handle other mission tasks while managing your weapons and equipment. The game also offers challenge modifiers, PvP modes, and community-made maps and challenges through Steam Workshop.

Players often praise the cooperative missions for making teamwork and class roles matter, especially when alien swarms and friendly fire demand coordination. Reviews also value the challenge, replayability, and Steam Workshop content. Some describe solo play as less enjoyable, cite weak AI teammates or a small player pool, and find the missions difficult.