Deus Ex: Human Revolution is an open-ended action-RPG that merges combat with dialogue, missions, advancement your character (Adam Jensen), making choices and facing the consequences.
Upgrade different parts of Adam Jensen to suit whatever playing style desire, such as increasing his ability to hack, making him provisionally invisible, take more bullets before going down, and so forth.
This is part of the multi-path design that has been included in the game, with each level reflecting the amount of choice given in how to reach your objective.
Stealth was the final part showed that every level has multiple ways to get through it quietly. In fact, the entire game plays without killing anybody (except for bosses). It’s important to note that the stealth is based completely around line of sight and sound, with no shadows to be seen. There are 2 basic ways to play through, either as a ghost, don’t be seen, and the ninja, don’t raise any alarms.