Victory Mine

The begining of Episode Two
You get out of the Train Reck out of City 17 and you find out the Combine made a Superportal. Now you and Alyx Vance have to find a way to White Forest. The location you are in is the Outland Mines. The upper Mines hold the Communications center, and Mine train cars to carry the rocks to City 17. This is also the part Alyx Vance gets wounded by a Hunter. Zombies and Antlions are all around the upper part of the mines. A Vortigaunt carries Alyx to the mines while you gain the Antlion's attention. Find a elevator to the lower mines.

Abandon Mines
The mines have nothing here except the Antlions. There are no Resistance or Combine in the mines. When you find skellatons inside the webs and around the areas with supplys, there are no humans left. The Vortigaunt says when you try to find the extract. "The sad faith of these others, is are good forturtion". This could mean their lives depend on us to win this war.

Resistance Outposts
Some outposts around have Resistance members (really there is only one). The first outpost has Griggs and Sheckley. You help them avoid the Antlions so they won't reach the Vortigaunt healing Alyyx. Most of these outposts carry Hopper Mines so you can hold off the Antlion and Zombie combat. But Griggs and Sheckley have Resistance Turrets so you can hold off the combat. Most of these Hoppers and Turrets carry happy faces or lamba signs to let you know that is friendly machines. One of these outposts have a Thumper to hold off the Antlion Combat. Vortigaunts call thumpers replent devices. Plus all these outposts have supplys. Look high and low for some crates.

The Antlion Nest
The Antlions have taken over the mines. They have nests to hold their Grubs. Most of the mines have Antlions all over, plus the newest Antlion: The Antlion Worker. Most of the Antlion Locations have dark blueish rocks all over, some have acid (made by the Worker Antlion's acid spit. One of the nest locations are called the "Guardain's Lair", that is the area where you meet the Antlion Guardian. The Guardian is the one guarding the extract. Which is the only way to heal Alyx.

First part of chapter 3
The mines don't end. The first level of Freeman Pontifex has mine carts and also a pickaxe. It is also the area you fight the Guardian and another Antlion Guard. It also holds the Combine on bridge.

Antlion-lis Mines
The mines seen in Ravenholm have no Antlions, but they do have plenty of Headcrabs. Maybe these mines were taken by the Zombies.