Is a Microsoft surface pro 3 Good to play computer games on?

From the specs alone I would say no.
It will work for a month or so(clean windows installation), but will soon get laggy and weird.
Totally depends on your games though.
But Minecraft and high performance graphics will not work.

Better off building your own… You can get a great gaming pc for. Around $500 and itll last much longer if you know what you're doing or get help. This is what i plan on. Doing. Hope.i.