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.
Recent Reviews:
Very Positive - 94% of the 285 user reviews in the last 30 days are positive.
All Reviews:
Very Positive (5,161) - 93% of the 5,161 user reviews for this game are positive.
Release Date:
20 Apr, 2017

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Play Alien Swarm: Reactive Drop


Recent updates View all (16)

14 September

Alien Swarm: Reactive Drop Update Released

  • Fixed bots listen to everybody's GO command. Now they only listen to their leader.
  • Fixed deagle's shooting prediction
  • Improved bot re-assigning. Previously if player took a break or disconnected his marine(s) was assigned to a random player. Now marine(s) is assigned to a player with the biggest number of bots assigned.
  • Improved alien-to-alien collisions. Prevent rangers, shamans and parasites from blocking other aliens movement. Fix burrowed aliens having incorrect collision group and blocking other aliens
  • Add rd_horde_two_sided cvar. If 1 and Onslaught is enabled a 2nd horde will come from opposite side, e.g. north and south. This cvar doesn't change horde size.
  • Fixed bots being easily interrupted while welding
  • Added "FireRate" keyvalue to asw_sentry_top_cannon
  • Director ignores disabled escape triggers. Normally, the director would avoid spawning aliens inside escape triggers and avoid spawning aliens anywhere if marines were in one, but this causes problems when a disabled escape trigger covers a large area, such as the entire map of as_paranoia3.
  • Added func_rd_no_director_aliens brush entity
  • Fixed small visual artifacts on Cold Catwalks map
  • Removed the unused asw_ammo_satchel_bonus cvar

Source Code was moved to a new URL:
Download it from Bitbucket
More info
24 comments Read more

29 August

Alien Swarm: Reactive Drop Update Released

  • Fixed grenade launcher's projectile collision with dropped items & equipment. Added rd_grenade_collision_fix cvar. It allows toggle on/off of the collision(default is set to eliminate collision with weapon items)
  • Fixed incapacitated marine can pick up items
  • Fixed the superroll jump hack
  • Fixed crash caused by rd_spawn_medkits being not zero
Big thanks to Draven for the fixes!
28 comments Read more

About This Game

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: 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

System Requirements

    • OS: Windows® XP or above
    • Processor: Pentium 4 3.0GHz
    • Memory: 2 GB RAM
    • Graphics: DirectX 9 compatible video card with 128 MB, Shader model 2.0. ATI X800, NVidia 6600 or better
    • DirectX: Version 9.0
    • Storage: 4 GB available space
    • Sound Card: DirectX 9.0c compatible sound card
    • OS: Windows® XP or above
    • Processor: Intel core 2 duo 2.4GHz
    • Memory: 4 GB RAM
    • Graphics: DirectX 9 compatible video card with 128 MB, Shader model 2.0. ATI X800, NVidia 6600 or better
    • DirectX: Version 9.0c
    • Network: Broadband Internet connection
    • Storage: 6 GB available space
    • Sound Card: DirectX 9.0c compatible sound card
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