A lot of things can change during the development of a game. Half-Life is rich with lore, and because of this, things have constantly changed during the series development.

Nihilanth is shrouded in mystery. Our first and only encounter with him doesn’t reveal much. We know very little about him – but he is key to the Half-Life story.

From a technical standpoint, Aperture Science and the Combine go together like peas in a prisoner pod. There are some startling similarities between their weapons and equipment that may point to an unseen element of the story.

Like any story with its depth and complexity, the Half-Life series leaves a lot to the imagination. In fact, considering the latest installment’s cliffhanger, it leaves more to the imagination than anyone wants.