10. Sniper Elite 3 - Authentic
By putting you in the role of American marksman Karl Fairburne during World War 2, Sniper Elite 3 places you in relatively untouched environments within video games featuring countries like Libya, Egypt, and Tunisia.
The game’s main difficulties (Cadet, Marksman, and Sniper Elite respectively) raise the stakes by changing standard things like enemy health, damage output, and awareness, but the apex challenge level of Authentic takes things up a considerable notch.
First off, the HUD is completely removed. Everything from your mini-map to your weapon and ammunition count is wiped away. Enemies basically become aimbots with their awareness at Daredevil-esque levels, knowing exactly where you are and converging on your position should you fire a shot without a noise to mask your assassination attempts.
The biggest roadblock to success is that the game removes your ability to save during a mission, meaning that you have to complete each mission in one attempt without dying. The ability to play in co-op slightly circumvents this feature, but friendly fire is also enabled.
Challenge is more often than not relished by gamers, but after a few failed attempts, SE3 can spawn as much frustration as it can satisfaction.