$3:

Game Steam Link
Resident Evil Revelations 2 - Episode One: Penal Colony https://store.steampowered.com/app/287290/Resident_Evil_Revelations_2/
Resident Evil https://store.steampowered.com/app/304240/Resident_Evil/
Resident Evil Revelations https://store.steampowered.com/app/222480/Resident_Evil_Revelations/

$10: All above, plus:

Game Steam Link
Resident Evil 6 Complete https://store.steampowered.com/app/221040/Resident_Evil_6/
Resident Evil 5 Gold Edition https://store.steampowered.com/app/21690/Resident_Evil_5/
Resident Evil 4 (2005) https://store.steampowered.com/app/254700/Resident_Evil_4_2005/
Resident Evil 0 https://store.steampowered.com/app/339340/Resident_Evil_0/

$20: All above, plus:

Game Steam Link
Resident Evil 3 (2020) https://store.steampowered.com/app/952060/Resident_Evil_3/
Resident Evil 2 (2019) https://store.steampowered.com/app/883710/Resident_Evil_2/
Resident Evil 7 Biohazard https://store.steampowered.com/app/418370/Resident_Evil_7_Biohazard/

$30: All above, plus:

Game Steam Link
Resident Evil Village Gold Edition https://store.steampowered.com/sub/764692/