Actually Asguaard is 55% off!
http://store.steampowered.com/app/332380
And here is for the Millennium series:
http://store.steampowered.com/app/280140
http://store.steampowered.com/app/298820
http://store.steampowered.com/app/298830
http://store.steampowered.com/app/298840
http://store.steampowered.com/app/298850
Have fun!