Game changes

If you were in shadow in Last Light/Redux you were totally invisible. In 2033 there were progressive levels of illumination, and even in pitch blackness moving around or getting too close in front of someone might make them notice you. Same with sound. Silenced weapons weren't totally silent, and armor would actually stop bullets, so you couldn't just stealth an area just by head shotting everyone with a silenced Kalash. It made the pneumatic weapons extra valuable because those actually WERE silent and were often armor piercing. And then the melee system was also harder. You actually had to aim with your knife for a stealth melee kill, otherwise your adversary might start screaming as he bled out.reddit.com