This game is perfect for short gameplay sessions. Has intense, Wolfenstein 3D - like action and ideal length of levels - enough to get your fun, not enough to get bored or frustrated. Really good art, smooth flowing level design (all flat mazes like in Wolf, but you never get lost). Getting XP and character stats and weapons upgrading between levels successfully prevents rage-quitting if enemies prove too hard. After all you are always a little bit more powerful every next time you try. Launches and loads up under a minute, which is very, very important, if you play in 10 minute sessions. The only one con is over the top head bobbing. Can cause nausea while playing in full screen, we could use an option to turn it off.