I can't remember, it such was a long time ago, 10+ years maybe. It was probably somethin on the Playstation 2 since my family had that before the Wii. So, either Rampage or Mortal Kombat: Armageddon?
The Sega Genesis port of the original Mortal Kombat back in 1992.
It was my older brother's and I was like 3 years old. I had a lot of fun with it (and other stuff on the Genesis) and the (bare bones) story and setting sparked an interest in me from that young age. I attribute part of my growing up and wanting to become a published author to it. I was never scared of the violence, probably mostly because I didn't really know how to pull of the Fatalities back then so it was mostly just a fun fighting game. Between that and seeing the original Child's Play around the same age, I very quickly understood that media is just media and I've never been scared of horror movies or anything. All things considered, I feel like I came out more well-adjusted and grounded in the end thanks to those experiences despite what some people might think.
I think Pokemon Emerald probably. I remember playing that one the most. No other games come to my mind. I loved it so much and played it all the time. I cried because I wanted my own copy because it wasn't mine. I always went straight for that game and would play for hours.So my cousin eventually gave it to me as he wasn't a big Pokemon fan. It was 2005 so I was 6 or 7. Also remember playing a lot of Friends of Mineral Town in elementary. That was one of the first games I played as well and it's still one of my favorites.
Wait, do leap pads count?! I have three of them and all their games in a little bear backpack in my closet.
One of these days I'm going to wear that thing in public.
To the best of my knowledge, it was Croc for the ps1.
Having said that, I do have vague memories of Bugs Bunny & Taz: Time Busters, a Pink Panther game of some sort and Sonic for the Genesis, so any of those could well have been my first!