What if everything that went wrong on "A Red Letter Day" was not caused by what you thought? What if your teleport ripped a hole in space and time? Now you must travel through time to correct the events and set right your past.

Causality Effect
A Red Letter Day Gone Wrong

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Causality Effect has been updated. I have fixed and changed little bugs found in the mod after its release. In other news the mod will be aired in PC Games magizine this month and will be on a DVD disc that comes with your magizine.

Causality Effect
?A Red Letter Day Gone Wrong?

Causality Effect Patch - Source SDK 2013

Causality Effect Patch - Source SDK 2013

Patch 4 comments

This patch fixes most issues related to engine branch incompatibility and is designed to run using the latest "Beta" of Source SDK Base 2013 Singleplayer...

The installer

Full Version 4 comments

Download me to install the game

The Video Trailer

Movies 0 comments

Check out the trailer with in game footage.

Post comment Comments  (20 - 30 of 79)
Rallymen007
Rallymen007

Just finished this mod, and I really enjoyed playing. Mapping is nice, cut scenes are good, but the timeline is kind of weird, all those teleports confused me :)

But, how do you get other endings ?

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ig
ig

Yuo kill breen or alyx or both or neither

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PsiKO911
PsiKO911

OK but how do you kill them?

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johnnyB96000
johnnyB96000

you just run up to them at the last scene and shoot them with a shotgun as quick as possible, both one or the other or none gives 4 possible endings.

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babadiboopi
babadiboopi

i greatly enjoyed this mod. it had some awesome level design and gameplay and i thought the whole concept was fascinating and well executed, especially with how Alyx is evil instead of good; it was crazy how you could kill her!

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prator
prator

I enjoyed the mod, but I confess that I don't get how to achieve different endings either. I TRIED shooting Breen many times, but he seems to be invincible whenever I'm in a cutscene, and I didn't see any other opportunities to attack him. That said, it's kind of jarring to throw a grenade into a large group of people, see the boom, and not have anyone be affected by it.

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LinkCastGaming
LinkCastGaming

um youre wrong u can change it you have 4 ENDINGS duh!

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soccerman
soccerman

pretty good mod. I like how you use the actual voices of the characters and make it fit. Im not too far into the game but im stuck in this one part. Im in a small room that i got to by breaking a cinder block wall, it has a broken ladder that cant be climbed and a door that wont open. there isnt anywhere else to go

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soccerman
soccerman

for some reason the door wouldnt open even though i was clicking it. eventually it did work. I got to the end and destroyed all the helicopters, so why the hell was i executed?

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gribbleshnibit8
gribbleshnibit8

Pretty Decent from what I've seen, I liked the teleporter thing. However, I'm stuck getting out of it. I can get out of the teleporter, but trying to cross the room just puts me back in it. It's extremely frustrating. I'm sure I'm missing something obvious, which makes it even more frustrating. Any help maybe?

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