Reaction is a Single Player mod for Valve's Half-Life 2: Episode 1. This game is a showcase for the design and artwork of Sensory Overload team. It is a fast-paced third-person shooter, retaining a very light RPG element. Please enjoy the game!

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Blog RSS Feed Post news Report abuse Latest News: Reaction, Post-GDC: Moving Forward

2 comments by BrianHQ on Mar 30th, 2009


First and foremost, I'd like to thank the major outpour of hits and downloads that we got from the first week of release! We got up to rank 3 at the highest, which is about 5000 spots higher than expected... honestly! I hope that it was up to most of your standards (can't please everyone!), and all of your suggestions have been duly noted. However, I'd like to push those that played through the game further for even more ideas on where we can focus our game. There are two main questions I have:

1) Would anyone prefer Reaction as a HL2MP mod instead of single-player?
2) If we changed the enemy AI, would that change your decision?

Obviously changing the enemy AI is a more daunting task. There is a good reason for it though, and in part because of the initial feedback we got from Valve when we visited their booth at GDC. Putting together a fully functional single player mod means a lot more in terms of the level design and pacing part of games than would a MP mod, even if it means more work and thinking (oh, thinking!).

I realize I haven't really addressed much on the art/design front; this is mostly left for us to convene with first. I'll be honest, we haven't made much headway on getting the game moving along artistically and to be honest, I don't know who among our current artists will have time to work on it. In the event we are more tied down than we want to be, be on the lookout for the job board!

Also, I was surprised that I only received one real issue with the install so far -- on Vista, it turns out that the installer doesn't look for Steam/steamapps because of a user-privilege issue. Has anyone run into problems outside of that?

Your comments and answers will be appreciated!


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Reaction v1

Reaction v1

Mar 20, 2009 Demo 13 comments

Reaction v1, released March 20, 2009. Reaction is a third person mod for Half Life 2. This is the initial release of the level.

Reaction - "Explosions" Trailer (HD)

Reaction - "Explosions" Trailer (HD)

Mar 9, 2009 Trailers 0 comments

This is a trailer we made to promote ourselves for GDC. We just want to show some of the updates we've made, primarily the changes in gameplay situations...

Reaction Teaser 1 (HD)

Reaction Teaser 1 (HD)

Mar 9, 2009 Trailers 0 comments

Teaser 1 -- This is a basic flyby of an earlier version of the level. You can see that the level is stacked on top of each other; we changed this eventually...

Post comment Comments  (0 - 10 of 35)
gettergetter May 18 2015 says:

Can I change it to first person?

+1 vote     reply to comment
theironbagel May 18 2013 says:

What is the actual game this mod is played on?

+1 vote     reply to comment
girnade May 11 2013 says:


0 votes     reply to comment
Lusicore Aug 11 2012 says:

are u friggin nuts? if this is for ep1, what is it doing here? dumb ppl nowadays...

-3 votes     reply to comment
IBN5200 Jun 29 2012 says:

This mod doesn't seem that good, from the video I can see that the mechanics are the same as Half-Life 2, I don't see much of a difference besides the change of models and textures. Perhaps this needs something different...

+2 votes     reply to comment
Dcpress98 May 27 2012 says:


+2 votes     reply to comment
Sammy123100 Sep 24 2010 says:

I was searching in half life 2 mods and noticed this, you say it is a mod for half life 2: Episode 2?
why is it counted as a half life 2 mod then?

+1 vote     reply to comment
blooper124 May 26 2012 replied:

it says ep 1.....

+3 votes     reply to comment
The_Headcrab_Farmer Feb 13 2010 says:

This was somewhat fun, i love the design! Bit repetetive, and since it's Third Person... how about a cover system à la Army of Two? Not to forget the sliding walk.

+3 votes     reply to comment
Sibelius Oct 9 2009 says:

Well, I appreciate the differences...but overall, this mod sort of just bugs me a little.maybe it'll get better as I go, but for now....I dunno.

+1 vote     reply to comment
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Half-Life 2: Episode One Icon
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Released 2009
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Third Person Shooter
Single Player
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Reaction Reaction
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7 months ago
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