There is no skill in games like D:OS. To be able to react with what you have to a challenge ahead of you isn't based on skill but on basic intelligence.
Allow me to disagree with you - I think there is pretty much skill involved in D:OS: ability and skill to think strategically, to perceive the weaknesses and strengths of your enemies, to solve riddles and so on^^. I agree, those are based on basic intelligence, but not each and every player has this intelligence! Otherwise, everyone would also be able to play chess... which clearly is not the case. (In contrast, in my personal opinion: there is not real skill involved in first person shooters - they are based on brainless smashing of buttons and for me there is no skill involved in being able to hit the right button when there is a red prompting on the screen "press 'F' to finish your enemy")
