My first desperados game and boy do i feel like i missed out. it sort of plays like classic metal gear or hitman but in a crpg kinda way.
There is often a predetermined way to solve a problem but your solution can deviate from the "intended" quite heavily.
I also love how the showdown mode allows almost 'pixel perfect' moves without it being tedious to pay and you don't have to memorize every hotkey.
if you like stealth games this is a must-play in my opinion.
and yes, you can rotate the camera and autosave only overwrites quicksaves but not manual saves