STOP IT NOW.
Correct usage is as follows in these samples:
The guys at valve ARE going to finish HL2.
Valve IS going to finish HL2.
When speaking about many people, you say ARE. When speaking about many people as one entity, you say IS.
Another example,
"School is gonna raise the price for prom admission." It's not "School ARE going to raise the price for prom admission." The reason being, when you say school, you really mean the school board, comprised of more than one person.
So in conclusion, STOP SAYING IT WRONG.
Correct usage is as follows in these samples:
The guys at valve ARE going to finish HL2.
Valve IS going to finish HL2.
When speaking about many people, you say ARE. When speaking about many people as one entity, you say IS.
Another example,
"School is gonna raise the price for prom admission." It's not "School ARE going to raise the price for prom admission." The reason being, when you say school, you really mean the school board, comprised of more than one person.
So in conclusion, STOP SAYING IT WRONG.