$6:

Game Steam Link
Warhammer 40,000: Inquisitor - Prophecy https://store.steampowered.com/app/1042800/Warhammer_40000_Inquisitor__Prophecy/
Warhammer 40,000: Dakka Squadron - Flyboyz Edition https://store.steampowered.com/app/1253190/Warhammer_40000_Dakka_Squadron__Flyboyz_Edition/
[COUPON] Warhammer 40,000: Chaos Gate - Daemonhunters - Execution Force (DLC) - 60% off https://store.steampowered.com/app/2421890/Warhammer_40000_Chaos_Gate__Daemonhunters__Execution_Force/
[COUPON] Warhammer 40,000: Battlesector - T’au (DLC) - 30% off https://store.steampowered.com/app/2583910/Warhammer_40000_Battlesector__Tau/

$12: All above, plus:

Game Steam Link
Warhammer 40,000: Inquisitor - Martyr https://store.steampowered.com/app/527430/Warhammer_40000_Inquisitor__Martyr/
Warhammer 40,000: Shootas, Blood & Teef https://store.steampowered.com/app/1324530/Warhammer_40000_Shootas_Blood__Teef/

$15: All above, plus:

Game Steam Link
Warhammer 40,000: Chaos Gate - Daemonhunters https://store.steampowered.com/app/1611910/Warhammer_40000_Chaos_Gate__Daemonhunters/
Warhammer 40,000: Battlesector https://store.steampowered.com/app/1295500/Warhammer_40000_Battlesector/
Warhammer Age of Sigmar: Realms of Ruin – Ultimate Edition https://store.steampowered.com/app/1844380/Warhammer_Age_of_Sigmar_Realms_of_Ruin/