$12:

Game Steam Link
Muv-Luv https://store.steampowered.com/app/802880/MuvLuv/
Muv-Luv photonflowers* https://store.steampowered.com/app/889700/MuvLuv_photonflowers/
[TDA00] Muv-Luv Unlimited: THE DAY AFTER - Episode 00 REMASTERED https://store.steampowered.com/app/1407100/TDA00_MuvLuv_Unlimited_THE_DAY_AFTER__Episode_00_REMASTERED/

$15: All above, plus:

Game Steam Link
Muv-Luv photonmelodies♮ https://store.steampowered.com/app/889710/MuvLuv_photonmelodies/
[TDA01] Muv-Luv Unlimited: THE DAY AFTER - Episode 01 REMASTERED https://store.steampowered.com/app/1407090/TDA01_MuvLuv_Unlimited_THE_DAY_AFTER__Episode_01_REMASTERED/
[TDA02] Muv-Luv Unlimited: THE DAY AFTER - Episode 02 REMASTERED https://store.steampowered.com/app/1342410/TDA02_MuvLuv_Unlimited_THE_DAY_AFTER__Episode_02_REMASTERED/
[TDA03] Muv-Luv Unlimited: THE DAY AFTER - Episode 03 REMASTERED https://store.steampowered.com/app/789830/TDA03_MuvLuv_Unlimited_THE_DAY_AFTER__Episode_03_REMASTERED/

$21: All above, plus:

Game Steam Link
Muv-Luv Alternative https://store.steampowered.com/app/802890/MuvLuv_Alternative/
The Imperial Capital Burns - Muv-Luv Alternative Total Eclipse https://store.steampowered.com/app/2630300/The_Imperial_Capital_Burns__MuvLuv_Alternative_Total_Eclipse/

$26: All above, plus:

Game Steam Link
Muv-Luv Alternative Total Eclipse Remastered https://store.steampowered.com/app/787510/MuvLuv_Alternative_Total_Eclipse_Remastered/