Are keys from summerseal.com still working?

They should

Mine worked. But I redeemed them before it ended.

Cool! shadowgrounds survivor

There's no reason for them not to, steam keys don't have an expiry date unless printed on a bottle of milk.

Give me one and will check :D Just kidding i have the game already.

Well there is no reson like mabako says the keys not work :)

Im interesed in Shadowgrounds..

make us a private giveaway plz

Create some public giveaways and PM to mods.