@Apreche Deus Ex Human Revolution (Directors Cut) is the best 0451 game to come out in the last 10 years (better than dishonored and prey even). You definitely should go back and play it. It really does update the original Deus Ex to be a more fun game to play but still includes a ton of systematization, world building, philosophy and interesting locales. The adversarial conversation system for conversation boss fights is still somewhat unique in its execution today.
@Rym System Shock 2 while being from 1999 still works really well in achieving first person survival horror. It is the Ur-game for popularizing the FPS-RPG hybrid as a genre. I played a vaporware version that incorporated the unofficial patch on a disk snail-mailed to me by a friend in 2012 and it was still one of the best game experiences of my life. The audio design is top notch and while there are some intricacies of the era (the inventory management) it is worth the price of admission. Go buy it on GOG.