Great game! Similar to your typical top-down vertical shooter, but instead of controlling airplanes or space ships or dragons or whatever, you have fantasy medieval RPG characters. You have a band of up to 3, of which you can pick from up to 5 characters that join the band as the story progresses.
Each character has their own individual abilities, from their start-out attack to the additional abilities and upgrades that unlock as they gain experience levels.
Also, you designate one character as the leader of the band, and each character has their special leadership abilities become active.
The game doesn't feel inherently grindy, although I believe some grinding is required - I don't think you can play through each level on one try, but feel free to try to prove me wrong! The point is that the little bit of grinding that is required is actually fun because it gives you a chance to try out different combinations of characters and leaders for your band, to see what best suits the particular level and your particular play style.
All in all - great, fun game. 5 Stars!
And for something similar but completely different, try Road of Heroes, also by IriySoft: http://www.newgrounds.com/portal/view/695588