I remember as a teen thinking this should have had a multiplayer where you essentially have two people be things that has to pretend to be human and kill and infect other players while the rest had to complete objectives around the map...
It's funny because it was essentially Among us and would have been super popular. Although I guess closer to "trouble in terrorist town" as you would be able to find a very limited number of the testing kits from the single player which would force people out of their disguise if guessed correctly.
Happy to see this game make a return though, as very fun experience for the most part.