It's a freeware title available on Steam. I like it. So I'm going to tell you about it so that I can get you addicted, so we can maybe play together sometime.
It's ultimately a hack n' slash game. The weapon options are sword, gun, and bomb. The game will start you off with a basic one of each that you can never get rid of no matter how much you want to. Everyone kind of figures out which type of weapon they want to specialize in. All of your stats are tied to your gear, so after a few hours of playing you can upgrade your armor to something that would offer some bonuses to a certain weapon type.
Every piece of gear has a level of 1 to 10, and at levels 5 and 10, they gain a bonus. For armor and helmet, it's +1 health. For weapons, it's a slight decrease in time of charging your weapon's special. They gain levels by obtaining Heat, which is basically just EXP. Each piece of gear has a tier level, from 0 (which is just the starting gear) to 5 (which you will likely never have unless you're willing to pay real money). The higher the tier level, the longer it takes to level up.
Obtaining stuff is primarily mission based. As you do missions, you go up in rank and more missions become available, until you get to the point where your rank is so high not even four dudes who have half-prepared for a mission can't win by themselves so they decide to grind levels for a while. You'll also unlock some other stuff, like being allowed to by higher-tiered gear, or recipes to craft them.
Seriously, though, this game is an absolute blast if you get yourself and some friends to play. I'm not sure what the party limit is (I think 8?), so just download it off of Steam and play!
Please play with me.