How many players coop is this game?

they changed too much...

https://steamproxy.net/sharedfiles/filedetails/?id=3178468851 the in-game sprites have less details and it makes them look like they're from a flash game or cartoon for toddlers.

I purchased Nightmare day or 2 ago. When got to the install page when I clicked on install it wouldnt do anything. Thought it was a fluke and would deal with it later. Well I cannot get to the install page again and it doesnt show in my library except under SR4. When I go to the store page it says "its in your library and will install when you install the game." However my SR4 is already installed so I uninstalled and reinstalled it and still the content is not there. Any help is appreciated....

For the past month I have been obsessed with the Half-Life franchise, I've beaten the original Half-Life, Half-Life: Opposing Force, and Half-Life: Blue Shift all in the past week. In Half-Life: Blue Shift, you play as Barney Calhoun, a security guard at the Black Mesa Research Facility. Barney Calhoun then reappears in Half-Life 2 as a secondary character. I haven't played SOR4 in quite a while, so just a few minutes ago I decided to hop on and replay the campaign on a harder difficulty than usual. But th...