I know a lot of persons might downrate me,but i abominate EVERYTHING about this game.I play it just for the badges and as soon as i get them both i will stop playing it forever.
To get hell dining badge easy,buy the earthquake gun,upgrade it a bit and spend the rest on gunmen.Then play as you are meant to.While they are down your gunmen will easily kill them.Hope this helps :)
@Danaban:That was infact a chinese torture.It caused madness and if you stayed too long under a droplet water it made a hole through your head.Yes really.