I need some resident evil 5 challenges. any ideas?

Alright im a huge fan of the RE series and i love a good challenge. Well im also not very creative and the biggest challenge ive done was to complete the game using only a non upgraded pistol on professional difficulty. I am currently on chapter 5-2 so i havent completed it but i need your own creative challenges that will put me to the test. Challenges that will make the game truly a survival horror. Or if you have any mercenary or downloadable content challenges then feel free to post them. Thank you so much for your time and any challenges that pop up i will most certainly give them all a shot. LOL not to mention that the pistol only challenge is a straight up pain in the a**! its extremely fun and sometimes stressful but you and your partner will get so f****d up by the enemies that you will just simply have to laugh at your failure. Its so intense that you have to literally strategize every single bit of the game just to get by with luck. And certain parts you realize that you have no choice but to run like hell or your screwed. I recommend you try this out if you already beat it on professional and definately play with someone that has completed professional themselves.