Somewhat fun if you enjoy old dos platformers.

Play Episode 1 on Normal, Episode 2 on Easy, and avoid Episode 3 altogether unless you are a masochist.

Episode 2 starts of alright but half way through you have levels where you get killed because of cheap enemy placement or spikes. So unless you want to redo levels, you can enjoy a full health bar and a better basic gun on easy mode. I actually beat it on normal, but found it to be more of a chore towards the latter stages and especially the final boss.

Episode 3 is totally unfair. The first level starts off with mines that can barely be seen and just trolls you with these super fast enemies who blow themselves up and misleads you to your death without any warning. It's just annoying.