Can we draw the following hypothesis from the context?

Context:

Doom (stylized as DOOM) is a series of first-person shooter video games developed by id Software. The series focuses on the exploits of an unnamed space marine operating under the auspices of Union Aerospace Corporation (UAC), who fights hordes of demons and the undead in order to survive.

Hypothesis: There were 5 games in the Doom series.
It's impossible to say