Reactive Drop is a completely free mod for Alien Swarm. Aims to have Player versus Player (PvP) game modes, enhance co-op part and add new content and features into original game without changing its concept.

- 8 player coop support
- Single player support for all maps(Offline Practise)
- PvP game modes: Deathmatch, Instagib, Gun game, Team Deathmatch
- All Rifle Mod features
- Includes custom maps by third party developers

Steam group
Changelog and more download options
Installation instructions

You need to have Alien Swarm installed in order to play Reactive Drop.

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8 players on Comm station map 8 players on Comm station map DM Hovermap After a Big Battle
Blog RSS Feed Report abuse Latest News: Reactive Drop December Update

0 comments by geotavros on Dec 14th, 2012

Team Deathmatch has Arrived

After a long coding, feature implementing and bug fixing the Team Deathmatch game mode is delivered. Currently it can be enabled\disabled on any DM map using console commands:
Or using keyboard keys "0" and "9" respectively, see cfg/deathmatch.cfg for details.
A new console command cl_select_loadout was added and bound to "m" key. It is used to select a marine and weapons for PvP game modes.
HUD and Loadout panel now show only team members.

The implementation of this game mode opens doors for new different team oriented game modes, like team elimination, capture the flag etc. It will probably be possible to allow mappers to create their own custom team vs team oriented scenarios. Something like "one team have to destroy one of 2 objects on a map, other team must stop them", or "one team needs to download critical data from one of 5 computers on a map and escape, other team must prevent this" etc.

General New Features

rd_deathmatch_loadout_allowed console variable controls whether the loadout is allowed for Deathmatch.
Added ladders support.
Added these flags for all alien NPCs, they can be set up using Hammer editor: flammable, teslable, freezable, extrahealth, sizescale, speedscale. These flags will allow mappers to significantly customize gameplay on their maps by creating stronger and faster aliens. It will be possible to create Bosses which will have a lot of HP and will be hard/uncommon to kill. There are plans of implementing a survival game mode, similar to DOW2 The Last Standalone, where marines have unlimited ammo and rechargeable extra items, they can revive the fallen squad mates...

The next step will be a round based team oriented game mode and a new map for this game mode.

This update has been upload to Desura and is currently waiting for approval.

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Reactive Drop 1.11 to 1.12 Patch

Reactive Drop 1.11 to 1.12 Patch

Feb 17, 2015 Patch 1 comment

Extract this into sourcemods folder. Requires version 1.11 installed. See changelog at homepage

Reactive Drop 1.11

Reactive Drop 1.11

Jan 5, 2015 Full Version 0 comments

Misc fixes, performance optimization and weapon balancing. Extract to <path to steam>\SteamApps\sourcemods. Restart Steam

Reactive Drop 1.10

Reactive Drop 1.10

Oct 8, 2014 Full Version 0 comments

New weapons, bug fixes, map fixes, jump_jet_trigger for mappers etc. Extract to <path to steam>\SteamApps\sourcemods. Restart Steam

Reactive Drop 1.09

Reactive Drop 1.09

Jun 21, 2014 Full Version 1 comment

Full 1.09 version. Recommended for those who didn't have Reactive Drop installed. Extract to <path to steam>\SteamApps\sourcemods. Restart Steam

Patch 1.08 to 1.09

Patch 1.08 to 1.09

Jun 21, 2014 Patch 0 comments

Extract this patch on top of 1.08 version. Added support for 7 bot marines. Added displaying of 7 marines in lobby screen.

Patch 1.07 to 1.08

Patch 1.07 to 1.08

May 23, 2014 Patch 2 comments

Extract this into sourcemods. Requires version 1.07 installed

Post comment Comments  (0 - 10 of 13)
Skulman54 Jun 27 2014, 11:59am says:

Is DM broken? I can't select my marine.

+1 vote     reply to comment
geotavros Creator
geotavros Jul 25 2014, 7:44am replied:

Nothing is broken. You can select any marine in DM. Default key to open selection panel is "m". You can bind another key in keyboard settings in game.

+1 vote   reply to comment
BenLubar May 26 2014, 10:09pm says:

Three wishes:

1. Bots in PvP modes, even if their AI is just "run to nearest marine and fire weapon at them".

2. Up the squad size to 8 to allow me to go on a singleplayer mission with 8 marines.

3. Fix the "playing swarm (mod)" thing when looking at friends playing Reactive Drop.

+1 vote     reply to comment
geotavros Creator
geotavros May 27 2014, 3:39am replied:

1. Planning to add in next version.
2. This is on the list for future releases.
3. This is Steam's issue. Every mod(that is in sourcemods folder) is now displayed like that. See:

+1 vote   reply to comment
GamerZoey May 1 2014, 5:41am says:

Any chance of adding A Capture The Flag Gamemode?

+1 vote     reply to comment
geotavros Creator
geotavros May 9 2014, 1:36pm replied:

Can be probably done. Are there mappers interested in this game mode?

+1 vote   reply to comment
Nemesisurvivorleon Apr 11 2013, 2:16pm says:

Needs bots. Every good multiplayer mod needs bots. There's NEVER someone available to play them with you. Especially not a crowd like would be desirable.

+1 vote     reply to comment
Setophorae Oct 20 2013, 2:58pm replied:

You could just use the Half Life Dedicated Server to set up your own server, which can allow you to spawn A.I enemies and friendlies.

It also allows control over damage, A.I intelligence, map texturing, etc etc, pretty much endless possibilities.
Though i'd say to set up a permanent server where there are 15-30 enemies and friendlies each, and when one dies, it re-spawns after a few seconds. This is something a lot of Alien Swarm players seek, and if you pulled that off it'd become extremely popular.

+1 vote     reply to comment
Dude Nov 29 2012, 8:58pm says:

Motherffff AWESOME! Tracking.
Can't wait to play it!

+4 votes     reply to comment
manstor Aug 22 2013, 11:32pm replied:


0 votes     reply to comment
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Released Apr 9, 2014
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