A
aoanla
Guest
Now that someone has mentioned that Opposing Forces is considered to be part of the back story, we can have evidence that the headcrabs we see in HL2 have been genetically modified.
In Opposing Forces, we encounter "Gonomes" - the next step beyond the more common Zombie form of a headcrabbed victim. These, in case people didn't get around to playing the expansions, have cool sideways mouths in their chests, are faster than a Zombie, and can throw acidic gunk at you (which also may be used to incubate new headcrabs, according to some suggestions). Since the entire plot of HL takes place over less than two days, and the plot of Opposing Forces is roughly the same length, it clearly takes only days, if not hours, for a headcrab to move through the Zombie state into the Gonome state (and thence possibly to further developments, possibly even eventually forming a Gonarch).
Now, in HL2, we have to run all the way through Ravenholm, which has clearly been bombed by the Combine with their nifty headcrab delivery mortars. There is every evidence that this happened more than two days ago, especially considering the number of traps which Father Gregory seems to have managed to set up, yet we never once see a Gonome. Assuming that Valve really do consider the Opposing Force plot to be part of the backstory, there needs to be some explanation as to why this is the case.
My hypothesis is that all the headcrabs we see in HL2 are specially "neutered" versions, produced specially by the Combine for use as biological weapons. Somehow, their natural development is halted in an early stage, preventing them from ever reproducing (and hence preventing a wave of zombified humans from overwhelming Combine troops). It is also quite possible that the Fast and Poison headcrabs are special variants crafted by the Combine as well - the Fast Zombies have obviously lost a large amount of mass in their transformation, and would be unable to develop into anything like a Gonome stage, let alone anything else, and the Poison headcrabs' potent neurotoxin seems a little counterproductive, in that it makes their target much more vulnerable to accidental death (when the preferred result would, presumably, be subversion by the headcrab itself).
Considering this, spare a thought for the poor, neutered headcrabs you encounter in HL2, cruelly limited by the evil Combine, just as humanity has been...
In Opposing Forces, we encounter "Gonomes" - the next step beyond the more common Zombie form of a headcrabbed victim. These, in case people didn't get around to playing the expansions, have cool sideways mouths in their chests, are faster than a Zombie, and can throw acidic gunk at you (which also may be used to incubate new headcrabs, according to some suggestions). Since the entire plot of HL takes place over less than two days, and the plot of Opposing Forces is roughly the same length, it clearly takes only days, if not hours, for a headcrab to move through the Zombie state into the Gonome state (and thence possibly to further developments, possibly even eventually forming a Gonarch).
Now, in HL2, we have to run all the way through Ravenholm, which has clearly been bombed by the Combine with their nifty headcrab delivery mortars. There is every evidence that this happened more than two days ago, especially considering the number of traps which Father Gregory seems to have managed to set up, yet we never once see a Gonome. Assuming that Valve really do consider the Opposing Force plot to be part of the backstory, there needs to be some explanation as to why this is the case.
My hypothesis is that all the headcrabs we see in HL2 are specially "neutered" versions, produced specially by the Combine for use as biological weapons. Somehow, their natural development is halted in an early stage, preventing them from ever reproducing (and hence preventing a wave of zombified humans from overwhelming Combine troops). It is also quite possible that the Fast and Poison headcrabs are special variants crafted by the Combine as well - the Fast Zombies have obviously lost a large amount of mass in their transformation, and would be unable to develop into anything like a Gonome stage, let alone anything else, and the Poison headcrabs' potent neurotoxin seems a little counterproductive, in that it makes their target much more vulnerable to accidental death (when the preferred result would, presumably, be subversion by the headcrab itself).
Considering this, spare a thought for the poor, neutered headcrabs you encounter in HL2, cruelly limited by the evil Combine, just as humanity has been...