[quote name='WilliamG']And for those complaining it doesn't play well with the kb/mouse, all I have to say is LOL.
Seriously, I really don't understand those PC gamers who refuse to use a game controller and bitch about the controls on a keyboard/mouse. GET WITH THE PROGRAM.

I understand some games work better with a keyboard/mouse, but it's time to wake up and realize that some games are just about unplayable without a gamepad.[/QUOTE]
unless they specifically state otherwise on the packaging (printed on the front of the box / at the top of the description on the store page,) I believe that all PC games should be playable with a keyboard and/or mouse. Maybe not as well as with a controller, wheel, etc. - but still playable.
The reason? Keyboard and mouse is the default control method for a PC, just like a controller is for a console.
Buying a PC game only to find that it's unplayable with KB+M is like buying a console game which, once you start your console, tells you to plug in some peripheral to proceed. If you don't own that peripheral, you'll most likely be annoyed that you have to buy something extra - that wasn't mentioned on the box - to play your game. That's exactly how some PC games feel when they buy PC games that are unplayable with KB+M.
tl;dr: PC games should all be playable with KB+M (but a lesser experience is OK) unless the controller, etc. requirement is
explicitly specified on the box/store page. Otherwise, it's like a console game requiring a peripheral and only telling you when you start the console.