This might seem like a dumb question, but has anyone actually beaten this game on hard? I am on the final Boss, and I can't beat this game, there just isn't enough ammo (By a huge margin). I know that some games aren't fully play tested before release (usually happens to rushed games that are very buggy on release). I've seen a youtube video of someone beating it on an easier difficulty. I would prefer not to have to replay all of the game just to beat the boss.

yes i finish the game on hard is possible :) .You need rocket launcher level 3 (red launcher) , final weapon of the second last-boss and the chaingun . these 3 weapons made final boss very easy , the cannon is more powerful than the chaingun but is not good for boss...

note: you can pick up the chaingun at the end of game on the corridor in the final part where are all the weapons except for red launcher. i not use the cannon only on the final fight because do weak damage but is a very good weapon for entire final part of the game.