No, Chrome is your "OS" in this case. You do have to account for processors though. Right now there is x86-32, x86-64, and ARM.
Go to any of the games and after you've started, right click and save-as to get the nmf file. It's a manifest which has separate nexes for each processor (these are just x86-32 and x86-64).
Go to any of the games and after you've started, right click and save-as to get the nmf file. It's a manifest which has separate nexes for each processor (these are just x86-32 and x86-64).