Can I name my game an already taken name?

I came up with a game idea nearly two years ago and thought of a nice name for it. When I googled it, no one had used the name for anything. Now that I google it again, someone has released their first game on Steam with the same name 6 months ago. Can I still use the name for my game, since I came up with it so much earlier and there is no affiliation whatsoever?