alien swarm doesnt start

[dodinx]

Hi all,
I cant run Alien Swarm it says "This game is currently unavailable, please try again another time". Please help me thanks !

[nakanishi]

usually they will ask you to
https://support.steampowered.com/kb_article.php?ref=9354-RTIB-6437
or
https://support.steampowered.com/kb_article.php?ref=6897-DMYX-9004
if you r trying download sdk n play its dont work wait your sdk finish download

[dodinx]

thank you, repair helped me !