Found 27th Oct 2017Edited by:"Muig1972"
As a companion to the Crysis £2.49 deal already posted, here's the standalone sequel in the Steam sale. It's great! Rated "Very Positive" from 1360 reviews. If you want both games you can get them for £3.74 if you buy the "Maximum Edition" from the Steam page. (Thanks Parasitemol)