Co-operative top-down shooter game available for free. An epic bug hunt featuring a unique blend of co-op play and squad-level tactics.
Key points
- Top-down co-op shooter
- Up to eight-player tactics
- Campaigns, challenges, and PvP
- Marine classes and weapons
Screenshots

About
Alien Swarm: Reactive Drop extends Alien Swarm, bringing more of everything: maps, aliens, game modes, guns... And most importantly Steam Workshop support.
• Tactical co-op for up to 8 players with a top-down perspective
• 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









