Alien Swarm: Reactive Drop

Alien Swarm: Reactive Drop

Reactive Drop Team · 2017 · Twin Stick Shooter, PvE, Co-op, Top-Down Shooter, Class-Based

PC
Very Positive95% · 23,707114playing now
This game is free to play. Get it on Steam →

Screenshots

About Alien Swarm: Reactive Drop

✦ AI summary

Lead a squad of up to 8 players in intense top-down tactical co-op combat against alien hordes across new campaigns, PvP modes, and challenge variations. Steam Workshop integration lets the community create endless maps and modifications, while expanded arsenals, new enemy types, and improved bots keep the action fresh whether you're playing solo, co-op, or competitive.

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
  • 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: Bulldog, 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

What Steam players say

Recent verbatim reviews from Steam — separate from playze.io community reviews below.

Recommended Jul 31, 2026
I gotta say, these devs took a small mediocre game with barely any content and made it into a pretty hype game. Reactive Drop is the best way to experience Alien Swarm and its still receiving updates to this day.
Recommended Jul 30, 2026
What an amazing game, if you like top down shooters this is a great game. Its free anyways so support the game and give it a try there loads of content and missions.
Recommended Jul 28, 2026
Excellent Fun with Friends (Played Alien Swarm for the TF2 hat, but it turned out to be pretty fun, so I played this with my friends)
Recommended Jul 28, 2026
Warms my heart that this game has been always updated by volunteeers. Most fun squad horde shooter game to play with friends or even randoms. This was Deep Rock Galactic before Deep Rock Galactic.
Recommended Jul 24, 2026
Free and fun
Recommended Jul 24, 2026
very fun, solid community, enjoying it. get a couple friends or jump in a public lobby. great game.

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