Back in the day (the 1940s), there were computers* being used in the world war. The UK was using a massive tube device - when it worked - called Colossus to decrypt messages. Bletchley Park was the place. In the US, we were using ENIAC to figure out trajectories for artillery shells.
Get that last bit? Artillery trajectory. One of the first uses of computers was trajectory. (The Bletchley Park stuff is VERY cool, but not relevant to my ramblings. Sorry, Limeys.)
After the war, people continued fooling with computers. Obviously. By 1947, someone had filed a patent for a "Cathode Ray Amusement Device". I guess "video game" didn't occur to them. What was the game? A simulation of a missile range - you try to hit the targets.
In 1958, they'd gotten a working model put together and changed the format marginally, calling it "Table Tennis".
That should be recognizable, right? To at least most of us. We called it "Pong".
By 1961, MIT students (of course) were playing something they called "Space War!" With a bit more tinkering, it became "Asteroids" which you REALLY ought to recognize.
Asteroids was released to an appreciative audience in 1979; there was a lot of stuff between Space War and Asteroids, but you're following me, right? All this is based on that original computer work done with trajectory calculation.
Since then, it's been a long progression of that original artillery game, with better graphics. The latest one is the most popular video game running, right now. (Image from Rovio.)
Enjoy your historically significant video game. Playing it on the most high-tech devices the world can offer. (Your smart phone? More computing power than the entire fleet of space shuttles.)
*Depending on how we define computers, we can be here all day and on into April, discussing the history of computing, all the way back to the Sumerians. I'm starting with tube devices forward, and you can't stop me.