I have been dizzy since about two days ago I played video games all day (never even play video games) since than I'm dizzy and can't walk straight.?

Vertigo. It is helpful for your doctor do describe the "dizziness." if it seems like the room is spinning, you may have an inner ear issue. If you are having just a lightheaded sensation, this can be due to multiple causes.
Eye strain. It is not uncommon for some people to develop eye strain when staring for long periods at computer monitors and playing video games. This often resolves in a matter of hours, however. Whether or not you over-did it, you should not be this dizzy. I suggest you see an eye doctor or your internist to further evaluate your dizziness.