I originally played Modern Warfare on Xbox 360, and loved it. My fandom for COD is casual for the most part. I don't play every release, but rather tend to cherry pick the ones that standout as being especially interesting to me. And for a long time I overlooked Modern Warfare because I thought it looked like one of the more generic ones. But COD4 was always popping up on best-of lists and eventually I gave it a try and it turned out to be one of the more riveting experiences I've had with the series.
What I liked most about the console version was the story - as surprising as that might sound. Basically, the campaign was a series of vignettes with multiple protagonists. And it was intense. The action sections felt like a rollercoaster ride, and the more somber moments were horrifying. I loved it.
When I heard there was a DS port, I absolutely had to pick it up. Unfortunately, it turns out that this is not a straight up port of the console game. Instead, it's a bit of a remix - using similar environments and throwbacks - but acting as a kind of gaiden campaign. You might think of this as more of a companion to the original game that lets you experience even more of the story from even more viewpoints.
Once my initial let-down wore off and I got into the game (and I came to grips with playing a FPS via stylus) I started to realize that, hey - this game is actually pretty fantastic. I'm actually super impressed with how well this game controls and how good this game looks considering it was developed for the original DS.
It's funny, too because sometimes I think I forget just how phenomenal the New 2DS XL hardware is. This game is a good reminder. Thinking back to when I had an original 'phat' DS and now playing something like this on this gigantic and sleek new screen is just amazing.
Anyway, I'm not too far into the campaign yet. Maybe an hour at most. My understanding is that this is a pretty short game, though - probably about half the time of its console big brother. But I must say I'm really into it. I kind of can't wait to get back to it and continue on.