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Alien Swarm: Reactive Drop

Game overview

Alien Swarm: Reactive Drop

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.

Twin Stick Shooter PvE Top-Down Shooter Co-op Class-Based
Last tracked players
73
All-time peak
272
24-hour change
Unavailable
Steam reviews
94.9% positive
22,649 reviews · via SteamSpy

Delayed observation · last tracked . Values marked unavailable are not estimated.

About this game Read the full description
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

Player activity

Concurrent players over the last 48 hours.

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AS:RD Update - April 20, 2026 "Going Up" Coming Soon: Steam PvP Fest 2026 AS:RD Update - November 1, 2025 "Cone of Fire"
System requirements Windows

Windows

Minimum

Minimum:
  • OS *: Windows® XP or above
  • Processor: Pentium 4 or newer
  • Memory: 2 GB RAM
  • Graphics: DirectX 9 compatible video card with 128 MB, Shader model 2.0b. ATI X800, NVidia 6600 or better
  • DirectX: Version 9.0b
  • Storage: 7 GB available space
  • Sound Card: DirectX 9.0c compatible sound card
  • Additional Notes: Disk space requirement depends on installed Workshop addons.
Game details Languages, features & support
Publisher
Reactive Drop Team
Brazilian rating
14
Steam Germany rating
16
Content warning
The main gameplay loop is using weapons to kill alien bugs. Aliens explode into blood and gore when killed. Bloodied human corpses can be found in some missions, but there is no graphic human dismemberment. Friendly fire with explosives can cause marines to break apart into cartoon "gibs". Profanity such as "shit" is used in voiced dialogue. Strong language is also used in some optional written content. Photosensitivity warning: There are some community-made missions that use a strobe light effect.
Achievements
198
Controller support
full
Features
Single-player, Multi-player, PvP, Online PvP, LAN PvP, Co-op, Online Co-op, LAN Co-op, Steam Achievements, Full controller support, Captions available, Steam Workshop, Camera Comfort, Color Alternatives, Custom Volume Controls, Adjustable Difficulty, Keyboard Only Option, Mouse Only Option, Playable without Timed Input, Steam Input API Support, Stereo Sound, Subtitle Options, Surround Sound, Steam Cloud, Stats, Steam Leaderboards, Includes level editor, Includes Source SDK, Family Sharing
Languages
English*, French, Italian, German, Spanish - Spain, Korean, Portuguese - Portugal, Russian, Simplified Chinese, Traditional Chinese, Ukrainian, Vietnamese, Japanese, Portuguese - Brazil
*languages with full audio support
More analysis Activity patterns, updates & developer tools

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Game Insights

Update Momentum

Infrequent Updates — 0 patches in last 30 days.

1 patches and 1 news items in last 180 days. Latest patch effect size: 0.00.

▼ No recent patches

Genre Benchmarks

Player Count Top 64%

Activity Heatmap

UTC+0 (Your Timezone)
170
Peak Activity
114
Avg Activity
4
Active Hours
2%
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Developer Analytics

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Frequently Asked Questions

Is Alien Swarm: Reactive Drop still getting updates?
Infrequent Updates — 0 patches in last 30 days. 1 patches and 1 news items in last 180 days. Latest patch effect size: 0.00.
Is Alien Swarm: Reactive Drop free to play?
Yes, Alien Swarm: Reactive Drop is free to play on Steam.
What genre is Alien Swarm: Reactive Drop?
Alien Swarm: Reactive Drop is a Action, Free To Play game.
Who developed Alien Swarm: Reactive Drop?
Alien Swarm: Reactive Drop was developed by Reactive Drop Team and published by Reactive Drop Team.
What platforms does Alien Swarm: Reactive Drop support?
Available on Steam for Windows.

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