About Alien Swarm: Reactive Drop
Taking its cues from its predecessor, Alien Swarm: Reactive Drop is a free-to-play action shooter with a top-down view and tons of extra-terrestrial baddies to exterminate. Reactive Drop includes an extensive campaign mode, PvP, and a vast array of deadly weapons to mince and mangle with. Play alone or with friends and mow down the alien hordes!
Tactical co-op for up to 8 players with a top-down perspective, Steam Workshop support for community maps and challenges, New co-operative campaigns, Challenges: Modifications of the game, just like Mutations in Left 4 Dead 2, PvP: Deathmatch, Gun Game, Instagib, and Team Deathmatch, Singleplayer: Play with improved bots on all our official maps, New Aliens: HL2 antlion guards and more
New Weapons: Desert Eagle, Devastator, and Combat Rifle, with more to come, Over 100 Steam achievements
Leaderboards: compete with your friends for the fastest mission completion, Improved spectating: see hacking minigames and mouse movements in real-time