Metal Slug X is a good game, but too short. I played it at the local game store and several minutes later, I was watching the credits. They still have it for $25 new, but I haven't bought it. I might eventually. Around here, shooters don't sell so well. I'm one of the only ones that seems to be a fan. I got Mars Matrix and Giga Wing 2 :)
http://www.HOnestGamer.com
Yeah, I'm the webmaster. And I really, really, really want reviews, guides, and such. If you like to write, please think about writing for my site. Check it out!