For a 2006 roguelike shooter, it's pretty solid.

En iyi psp oyunu

super addictive and fun rougelite fps, a nice hidden gem for the psp, recommended

I have to be completely honest, I feel so favorably about this slightly generic shooter because I was very good at it. There are essentially infinite floors and I climbed like 200 or so? Enough to see every unique variation of the bosses.