

However, the team soon realized the sheer discomfort of being near Jeff was effective enough and so the focus was shifted to making the player do things they really did not want to do but knew they had to in order to progress through the level. Early tests included more interactions with Jeff, such as hanging objects on him or pulling a keycard out of his pocket.

Jeff was designed to contrast with the art style in the rest of Half-Life: Alyx in order to signal to the player they would have to think differently for this level. However, the intermittent firefights while dealing with Jeff affected the tension of the level, so the action elements were shed to make Chapter 7 purely a survival horror section, and Jeff was re-imagined to take inspiration from the series' Xen elements.

At one point the team settled on making Jeff a giant blind Combine robot, as previous versions of Chapter 7 included a strong Combine presence. The level's elevator sequence was part of the earliest tests to see how a player would respond to being in a confined space with the monster, to which playtesters responded so well that the moment stuck. Jeff began as a Standard Zombie model and the level was built around it as an imposing entity in the player's personal space. The idea behind Jeff was to create a blind, unkillable enemy that a player would have to get creative to avoid in virtual reality. Jeff's main advantage can also be used against him as he could be directed away.Ĭhapter 7: Jeff was in development for three out of Half-Life: Alyx's nearly four years of development.

Jeff's body is also greatly swollen and disfigured: numerous lumps and spikes can be found around his body, and his right arm is much bulkier than the left. The human portion of its head is split open and with it has two mouths, two protrusions that give the appearance of a Venus Flytrap (similar to those of the "Snappers," small blue Xen flora/fungus-like growths that are found in the same area) and a smaller mouth with what seems to be rows of sharp teeth. Jeff is a humanoid zombie-like creature that appears to be the corpse of a Combine Hazmat Worker infected by an unknown parasitic fungus-like species from Xen.
