How to Add Two-Factor Authentication to Steam

If you’ve been playing PC games in the last few years, the accumulated games in your Steam account are probably worth hundreds (or maybe even thousands) of dollars. Perhaps even more importantly, your Steam account might contain in-game items that can be traded for real-world cash…and thus, stolen with some very real consequences. So it’s a very good idea to apply Valve’s Steam Guard two-factor authentication to your account.