A recent update to Half-Life 2 in the form of a new "test" branch for the game has raised some eyebrows among the Valve community, with some speculating that it could be a sign of an incoming content update to release in time for the game's 20th anniversary later this year. While little is yet known about the internal update, many Half-Life 2 fans were quick to draw comparisons to a seemingly insignificant branch update to the original Half-Life late last year, which turned out to be the game's massive 25th anniversary update which absolutely no one was expecting.