Well I’m not them, but for me: KSP1: 1800.8 hours. Current cost $40 = $0.02 an hour
My electricity costs to run the game are higher than the cost of the game itself at that point.
EDIT: Keep in mind that some of these have DLC, and if you buy them, it increases the price. Kerbal Space Program with all DLC is $70; that’s still an extremely good value at 1800.8 hours, but does bump the number up. Fallout: New Vegas has (good) DLC that I would want; all DLC would take the game to $45. Civilization VI would go to $230 (and I assume that they’re still turning out DLC). I listed Stellaris myself, along with a lot of other people. I really liked the game, and even the base game is a good game, IMHO, but in typical Paradox game fashion, if you buy all the DLC, it adds up to quite a bit — $470 currently, and they’re still turning out DLC. Someone listed DCS, I have The Sims 3 on my list, Total War: Warhammer II. All of those games have pricey DLC libraries that, if purchased in total, run multiple hundreds or over a thousand dollars (with the Total War: Warhammer series using an unusual take on this, where prior games in the series also act as DLC for the current ones). They can still be pretty cost-competitive per hour with other games, but only if the person who buys them is actually playing them a a lot.
My electricity costs to run the game are higher than the cost of the game itself at that point.
EDIT: Keep in mind that some of these have DLC, and if you buy them, it increases the price. Kerbal Space Program with all DLC is $70; that’s still an extremely good value at 1800.8 hours, but does bump the number up. Fallout: New Vegas has (good) DLC that I would want; all DLC would take the game to $45. Civilization VI would go to $230 (and I assume that they’re still turning out DLC). I listed Stellaris myself, along with a lot of other people. I really liked the game, and even the base game is a good game, IMHO, but in typical Paradox game fashion, if you buy all the DLC, it adds up to quite a bit — $470 currently, and they’re still turning out DLC. Someone listed DCS, I have The Sims 3 on my list, Total War: Warhammer II. All of those games have pricey DLC libraries that, if purchased in total, run multiple hundreds or over a thousand dollars (with the Total War: Warhammer series using an unusual take on this, where prior games in the series also act as DLC for the current ones). They can still be pretty cost-competitive per hour with other games, but only if the person who buys them is actually playing them a a lot.