It has a reddish appearance, with a similar (though bulkier) profile compared to later versions, and is noticeably bloodier even compared to Version 3. The headcrab this version refers to has both screenshots and textures available for it, which provide a decent idea for what it is short of model availability. However, this did not last, and even before the first set of zombie models were fully out, the classic headcrab had come back to Half-Life 2.Įventually, with the transition from the old zombie models to the fat zombie models, the headcrab went from reusing the fast headcrab's model to using its own, which at the time still held plenty of differences compared to its Half-Life counterpart. The Brickbat (BB) headcrab model reuses two textures from Half-Life 1's headcrab, albeit in a modified state, and has a polygon count that implies that it was around much earlier than even the later fast headcrab model.Concept art dated to 2001 for the headcrab zombie shows a fast headcrab on top of it, with an appearance that significantly resembles the 'old' zombie's textures, with rips near the elbows and knees.This would appear to indicate that the classic headcrab's model would have used earlier-completed composite-sheet fast headcrab's model before moving to Version 2. The texture sheet for the fast headcrab also appears in the classic headcrab's texture folder, with some coloring differences between the two.

All three of the 'old' headcrab zombies' textures use headcrabs that are much more akin to the fast headcrab, and share similarities with the fast headcrab's textures (particularly the side).This is also present on the brickbat model for the headcrab, which is shaped identically to the final fast headcrab with thin, long legs and a smaller main body. Both the model texture paths and the models themselves refer to the fast headcrab as 'Headcrab', and the normal headcrab as 'headcrab_classic'.Several factors suggest that the fast headcrab originally replaced the classic-style headcrab.

Half life poison headcrab