Well, if you mean first *ever*

The first thing that ever resembled a game that I ever made was some really weird racing thing with friends. I don't even remember how old I was (young), but i was having a sleepover with my friend, and my sister was with us as well. We found this fairly complex racing game, with a board, little car pieces, and a big, intimidating rule book complete with various kinds of dice. Of course, none of us cared to learn these rules, so we improvised. I basically declared the rules as we went along, since it was (sort of) my game. We found it in my closet, at any rate. All I remember of it was that sharp turns had a chance to blow out your tires, and other stuff like that.                                                                                                                                                                            The first thing I ever did on a computer was a text adventure. It was hastily programmed, but let the player move around a map (there was no actual *map*, except on paper, but the rooms were laid out in that kind of manner.) and fight randomly encountered monsters using a basic combat system. Different monsters were weak to different weapons, and choosing a sub-optimal attack gave the enemy the opportunity to do more damage.                                                                                                                                                                            The game's plot involved you being a trainee at some live combat training facility, but a boss monster (I called it the Colossus) had been awoken in one of the rooms, and when you got to that one you would have to fight it. There were different endings depending on how you beat the boss, and one where you didn't engage it at all, if you fought regular monsters enough to level up to the point where your instructors decided you were skilled enough to end the training.