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Serious Sam Titles are on sale for 75% off as the Steam daily deal for 5/30/13.
Serious Sam Complete Pack = $23.74 / £17.49 / €21.24
Serious Sam HD: The First Encounter = $3.74 / £3 / €3.74
Serious Sam HD: The Second Encounter = $3.74 / £3.74 / €4.74
Serious Sam HD: The Second Encounter – Legend of the Beast DLC = $1.24 / £1 / €1.24
Serious Sam Classic: The First Encounter = $1.49 / £1.24 / €1.49
Serious Sam Classic: The Second Encounter = $1.49 / £1.24 / €1.49
Serious Sam 3: BFE = $10 / £7.49 / €10
Serious Sam 3: Jewel of the Nile = $2.49 / £1.87 / €2.49
Serious Sam Double D = $2 / £1.49 / €2
Serious Sam: The Random Encounter = $1.24 / £1 / €1
Serious Sam 2 = $2.49 / £1.74 / €2.49