30 Day Video Gamer's Challenge - Very First Video Game: BASE WARS
I'm pretty sure this is the first game I ever played because I remember playing at this an age so young that I didn't know how to read yet.
This game was fun. You can steer the ball when you pitch and if the runner met with a baseman with the ball, there would be a one-on-one robot battle! And if you didn't have the robot with the gun arm, you were screwed!