This week you can get IL-2 Sturmovik: Cliffs of Dover Blitz with 75% discount and its DLC Desert Wings - Tobruk with a 25% discount or grab both of them in a bundle and save additional 10% on top of these discounts!
https://store.steampowered.com/app/1049440/IL2_Sturmovik_Desert_Wings__Tobruk/
https://store.steampowered.com/app/754530/IL2_Sturmovik_Cliffs_of_Dover_Blitz_Edition/
https://store.steampowered.com/bundle/15941/IL2_Sturmovik__Dover_Bundle/