the monster : Gene Worm

the Gene Worm is very cool and that is sad no one used it in hl mods [except me] .
i added it in the part where freeman gets of the lab and will jump in the water to stop the electricity production .
in my mod i used models that looks like eggs of the Gene Worm ;']
when player push the button then they are replaced by tentacles in the second part of the river .

a third stage could be the tentacle becoming a Pit Worm , the Pit opening the chrysalis with it eye having a laser ...
may be in the swamps after the garg was exploded ..[ a nice place to go back in the labs where freeman found the gauss gun ...may be player could get something that could turn the Displacer in a super weapon like with grenades when you do a banana bombs in svencoop .

at the end of mod , where barney keeps waiting for player to kill all blackops and stop the bomb [ decay has a map that happens in the same place : the one where players are aliens ] then next map could be more like black-ops against many Pit Worms that would walk . then the opening of the final fight being one Pit Worm becoming the Gene Worm