Steamworks +

40
Don't Starve @ $9.80 / €7.50 (50% off) - STEAMWORKS - DirectGameCards.com

expired Don't Starve @ $9.80 / €7.50 (50% off) - STEAMWORKS - DirectGameCards.com

DNTSTV

Roughly around 9.79 (excl PayPal 2.5% currency charge) Still looking for a Don't Starve copy for a low price? Here you go. Don't Starve shows many similarities with MineCraft.

181
Just Cause 2 $3.75 (75% off) @ Get Games Go

expired Just Cause 2 $3.75 (75% off) @ Get Games Go

A great game for a great price. Requires a free Steam account to activate.

490
Portal 2 - $6.79 on Steam once again

expired Portal 2 - $6.79 on Steam once again

Portal 2 is on sale once again at 66% off in case you missed it last week during Steam's Midweek Madness sale/deal. *(http://www.ozbargain.com.au/node/69650)* **Sale ends 3AM Tuesday (AEST)**

980
Steam Midweek Madness - Portal 2 - $6.79 | Final Hours DLC - $0.68

expired Steam Midweek Madness - Portal 2 - $6.79 | Final Hours DLC - $0.68

If you don't already have it then I recommend buying it now while it's at 66% off.

60
Sid Meier's Civilization V $7.49 (75% off) at Game Get Go & More

expired Sid Meier's Civilization V $7.49 (75% off) at Game Get Go & More

Total War Napoleon The Imperial Edition $4.99 (Steamworks) Sid Meier's Civilization V $7.49 (Steamworks) ..and many more strategy games on the site on sale.

140

expired Alan Wake (PC) $18.62 from Greenman Gaming Is Steamworks

HALFT-ERMHO-RRORS

Edit: sold out by the looks of it