Deus Ex was a seminal game when it came out. It was an important milestone for action RPGs, as well as choice and storytelling in the medium. So many games from today owes a ton of their mechanics to the classic.
That game is 15 this year and to celebrate, Square Enix got three of the game's key creatives in game director Warren Spector, lead programmer Chris Norden and writer Sheldon Pacottinto into a room to play their old game for an hour. It's a lovely little event and it makes for nostalgic watching.
Give it a look here: