Black Mesa, the fan-made, eight-years-in-the-making update to the fourteen-year-old GOAT contender Half-Life, released earlier this month. Gamasutra talked to project lead Carlos Montero about, among other things, what they brought from Half-Life's sequels back to the remake of the original:

"We actually made some changes to enhance the game. With the Source engine now and all the physics and stuff we definitely changed a lot of puzzles... We also changed some things relating to weapon progression and enemy progression, and I was taking a lot of cues from Half-Life 2. A lot of it came down to looking at Half-Life 2, and trying to figure out what Valve had learned, and we wanted to see if we could bring those lessons back to the original," Montero said.