Nice work
The third one's finally out! Nice job, although it could 've been longer. I can't believe you actually used the madness combat music! :D The begining was quite funny when the music started calm and then switched to the MC5 music. The new enemies were well drawn and it looks like it's had quite a bit of work put into it.
I know you said it was a three part series but I think you should bring out a Grey day 4 which if it's made should include:
More violence of course
The main character winning, because he's lost in every grey day so far
and a wider range of enemies? Like red eyed grey day agents. :D
Well done.