Dr. Steward knew something was wrong when the guy named Alpha woke up and came back from the game. It was a month before the scheduled time, which must mean that there were problems with the company's project, something that must be important to force him to return early.
Unlike players, special subjects were specialists, they should have no problem fleeing from danger, so accidental death was something that was not considered very possible.
But the doctor really knew that something was not normal when, instead of allowing the subject to gradually wake up, he received a call to force him to wake up with medication. He complained and warned of danger and unnecessary things, but orders were orders...
He was tired of this company, of its secrets, of the damned project in which they did not hesitate to threaten even personally in case of complaints or resistance from the staff.