I'm surprised by the number of people in this thread throwing negative criticism at people who would take a day off to play a game. I'm of the opinion that if you've got the time, take a day(s) off to do whatever you want; whether that's: playing games, being hung-over, enjoying the outdoors, housework, etc.
The current company I work for only allows carry over of 25% of your vacation days / PTO; otherwise it's "use it, or lose it." I consider vacation time almost as important as salary, and make the most of all the time that I get. After planning out the days I need to take off for the year (for planned travel, etc), I make a plan on how to spend all the leftover PTO I have. This usually includes: a day for E3, a couple Fridays in the summer just to enjoy the weather/outdoors, and a day or two saved for extra time around Christmas.
I'm not a big Souls fan, and I've never take time off for a game specifically before, though I think I might do so for the first time this year (or next) when Mass Effect: Andromeda releases.