Reviewers generally consider the Director's Cut the definitive version, though it has some technical quirks: REVIEW: Deus Ex: Human Revolution - Grimdark Magazine
The game is built on four main gameplay "pillars," allowing you to choose how to solve every objective:
: Highly recommended by critics as the most rewarding way to play. You can navigate levels via vents, use a tranquilizer rifle for non-lethal runs, and employ "social battles" to talk your way past NPCs.