Still love this game. I fire it up on my ps2 emulator every once in a while. Still have a working ps2, but I can crank up the graphics/resolution on the emulator so that it looks better than the original experience. It is pretty dated now and had some silly stuff (like ghost Cassidy as a guide) , but I really enjoyed the core gameplay mechanics and setting.
Haven't looked at them in ages but I also have the Art of Darkwatch book and a copy of Heavy Metal magazine that covers the game. There were some cool weird west levels in Red Dead Revolver too.