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Trine 2: Complete Story is on sale for 80% off as the Steam daily deal for 6/9/13.
Trine 2: Complete Story = $4 / £2.79 / €3.39
Trine 2: Complete Story 3-Pack = $8 / £5.59 / €6.79
Trine Complete = $5 / £3.59 / €4.29