Do not give your f***ing steam account info to anyone, this includes websites ending in .tk even if they look legit
.tk is the Internet country code top-level domain (ccTLD) for Tokelau, a territory of New Zealand located in the South Pacific.
do you really think steam has websites based in a territory of new zealand in the south pacific?
The L4D beta 2 is a scam as is this website, do not give them your info
http://steambeta3.tk/some one on my friends list got hit and he is spamming out the link, dont be a fool