Are all the valve created games tied together somehow? Except for TF2 like in portal 2 glados says she might start a hobby of reanimating the dead so is that left 4 dead?
The only Valve games that exist within the same universe are Half Life and the Portal series. Aside from referencing each other, Left 4 Dead, Counter Strike, and Team Fortress 2 and all other valve games exist in their own respected universes. Left 4 Dead cant exist within the same universe as Portal since l4d takes place in the year 2008. And as Portal and Half Life share the same timeline, the combine would have already taken over the planet at this point and in left 4 dead you don't see any of this. Also in Half life 1, the portal that allowed the combine to enter earth in the first place took place in 2000 in the game's story, again you dont see any of this in l4d. There are some other stuff in there but I don't feel like getting more into it. Oh yeah one more thing, In L4D2, Louis mentions that he feels like Gordon Freeman when he is on the minigun, the protagonist from Half Life. So according to L4D universe, half life is a video game just like in the real world so that would mean that Portal is too because both those series are tied in.
there are lots of possibilities. in left 4 dead Ellis once said he played team fortress 2 and Louis has played half-life. plus in portal there are several references to black mesa which was in the first half-life, also in half-life episode 2 you see an aperture science ship called the Borealis which hints at what happened in the time of portal 2. so in turn there are plenty of connections of between the valve universe's but no actual crossover has actually happened. but a big connection between two games i cant quite figure out. in left 4 dead 2 at the dark carnival you can win a garden gnome in a shooting gallery, if you can get the gnome all the way to the end of the level you win an achievement. but strangely in half-life episode 2 you can find a garden gnome at the beginning of the game and get it all the way to the base where you can stick inside a rocket where later you can blast it off into space! whats strange about this is there no clear connection between half-life 2 episode 2 and left 4 dead 2, since its already established that half-life is a video game in the left 4 dead universe. i mean in fiction most crossovers involve some kind of dimensional rift or tare, or even a portal...wait a second.
no or i thinks GLADOS PRO PROPOSED
