half-life 1: https://www.moddb.com/games/half-life...

half-life 1 HD: https://www.moddb.com/games/half-life...

half-life 2: https://steamcommunity.com/sharedfile...
https://steamcommunity.com/sharedfile...

black mesa: https://steamcommunity.com/sharedfile...
https://steamcommunity.com/sharedfile...
https://steamcommunity.com/sharedfile...
https://steamcommunity.com/sharedfile...

MMod: https://steamcommunity.com/sharedfile...
https://steamcommunity.com/sharedfile...
https://steamcommunity.com/sharedfile...

GoldSrc Portal:    • Portal in 30 Different Games  

GoldSrc Portal Gun:    • Half-Life 1: Portal Gun and Gravity G...  

half-life Blue Shift: I made it myself