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F.E.A.R. 3 is on sale for $3.84 (75% off) at Green Man Gaming (GMG). Use the voucher code PCGMR-GREEN-SUMMR to save an additional 20% off your order, which makes the game only $3.08.
The game uses Steamworks so you’ll have to activate it on Steam.
The 20% off voucher code expires on August 16, 2012.