X, also known as Twitter, is facing major outages around the globe on Feb. 16 as the U.S. celebrates a federal holiday.

Deep within the source code of this online multiplayer game lies an enigmatic number that puzzles and inspires experts to this day ...

You were just another C.T.R.L. employee clocking the graveyard shift, filing reports on things that shouldn’t exist. Now, the facility is under a sudden, total lockdown. Your main objective? Survive ...