DC (GC?) kindly shared the link on main (see it above). After winning the flash game you can enter your e-mail and they will mail you a key. You can activate the key on Steam, which will give you a coupon in your inventory. You can try it 10 times.
Here is the list of things you can win (or at least it was when I was checking it, not sure if they change it):
I've won Steam key for Trine Discount Coupon 75%. PM me if anyone needs it.
LOL SUMMER SEALS ARE BACKKKKKKKKKKKKKKKKKKKKKK~ They're so uguu
lol this looks fun. NEVER HEARD OF THIS BEFORE. Lol @ DC/GC
It now seems to be broken anyway :'D
Lol yes! I've been refreshing the page for some time now lol.
Got Shadowgrounds Survivor... The only game I got from the Summer Sales... Being poor is something that I don't recommend lol.
Seems like it works again?
edit: yep, got another key for Trine 2 Discount Coupon 75%.. PM me if you want to have it and so on.
got 3 coupons for trine 2 and 2 for trine. Just PM me to get one
I want shadow grounds ... dont even know what it is but it seems free :3