50 Cent: Blood On The Sand

There's not a great deal in terms of what I can offer you in advice on how to get this achievement, it's already stated in the achievement description; complete said mission on any difficulty. So instead I've linked in some videos that will walk you through this mission, they'll give you helpful tips on how to beat it on the hardest setting, show you the poster/target locations, enemy locations and when to expect scenarios and how to complete them!

While this specific achievement doesn't require you to play on Hard mode, you may find it beneficial to do so and work toward this; Solution for Bulletproof In 50 Cent: Blood on the Sand while playing through the campaign, check out that solution for some specific tips on beating missions on Hard mode.

* ^{Credit to savgcom for the videos}