I doubt it. SPECIALLY if you’re talking profit for Valve vs units sold. Valve sells these games as Steam exclusives. Most of their sales are digital and through their store, that means each brings in easily over 3 TIMES the amount of money each console sale would bring. And no, those games would not sell 3 times as much on consoles.
We know Portal 2 did better on PC than on consoles, and Left 4 Dead did better on console than PC. I don’t know about half-life 2.
My estimate would be 6+ million copies sold on PC for a half-life 3 title. possibly 8+ million on consoles (assuming they targeted last gen consoles, and not just next gen, which would mean lower numbers). Most of their profit would come form the PC side of things. Make it an exclusive, and I cna easily see 8+ million sales on the PC side 80% of which would be nearly pure profit. and would probably represent several million new Steam users which would spell even MORE money for them down the line.
This is why consoles exist. It’s why exclusives exist. I’m pretty sure Sony lost money by not putting TLOU on PC. They could have easily made a couple of million more sales on the PC platform at twice the profit margins (equivalent to 4 million console sales - incidentally a million more than the ACTUAL sales of that game). But it’s an exclusive because big budget, highly marketed exclusives, move platforms.