Hi DL,
Personally, I do play video games to relax. Not a huge amount of time, and I avoid any with overt sexual or violent content, but I don't see anything wrong with coming home after work and learning and playing something to chill out. Other things need to take priority (learning of course, davening, exercise, whatever), but I don't think theres anything wrong with using a video game to chill out. Would you think twice about listening to music, reading a novel, playing monopoly?
Could be that for the future it's something to think about phasing out (this is how I feel), but for now, and knowing if I stopped my free time would be become boring and frustrated - and from experience very likely of being nichshal, I think it's ok.
Think about why you're playing them. And if they truly help you with your learning / davening / whatever because you're a bit more relaxed, could be a good thing.
Just food for thought
sR