what if its a sign
hl3
we have to go deeper
예측하지 못한 결과에 대비하라
Prepare for unexpected results
what does it meannn
No, it's not another arg. It's a joke. The joke is that the "Unexpected results" are that your game is in Korean. Stop taking everything Valve says as the start of another arg. If HL3 is going to be announced soon, it will be at Gamescom in August. I have my doubts though, if anything that will be L4D3 running on Source 2, a Free to Play screening, or something to do with the Steam Box.
The bug was fixed now, so anyone worried that HL2 will be in Korean has nothing to worry about.