This is one of the major reasons that I love PC gaming so much. The communities that grow around games, in many cases, end up improving upon the originals and lengthening their lives. I’ve seen mods that went back and increased graphical fidelity and mods that changed some part of the gameplay to add an interesting new twist.
This does a little of both. It takes place in the same universe as HL2 and falls after episode 2 in the timeline. However, the creator took a little liberty and also changed how the gravity gun works a bit. You’ll have to give it a try to see what you think!
Transmission element 120 is fun and beautiful. Its also free, you should check it out!