Half Life 2: Extinction mod for Half-Life 2: Episode Two

I got a few messages from people thinking each of these chapters are a chapter in the mod.
Each Storyline chapter is a new mod itself with subchapters in each game to split it up.

Half Life 2:Extinction tells the story between Half life 1 and Half life 2 in a fictional way.
You play as Rob Rentrix, a rebel soldier, who has just survived the 7 hour war. Humankind has been overrun by combine forces and are close to extinct from the face of the earth. The last remaining forces of EF fight a desperate battle for survival in the bloody streets of City17.

The storyline of Half Life 2: Extinction is the cut into 3 diffrent chapters, much like a bookseries.

Chapter 1: Retreat
Summary: Combine forces launched from a giant starship in pods invade the earth in a series of heavy bombardments and attack forces.
Worlds nations overwhelmed by the attack quickly put together the EF (Earth Forces) and try to hold the incoming swarms of Troop Pods launched from space. In the next couple of hours the world saw the most horrific warfare and combat ever in history.
The attack launched destroyed the EF with 90% Killed and 5% wounded. The remaining units where scattered, confused and unable to contact Unicom for any news. The combine forces around City 17 dug in around the citylimits.
In the meanwhile Dr. Wallace Breen surrendered the earth to the overwhelming forces of the Combine.
Like the rest of the remaining EF forces in City 17, your goal is to escape the city and get into the forrest. While trying to accomplish this you will be in dense urban enviroments and small underground sewers and maintance tunnels.

Chapter 2: Woodlands
After succesfully escaping the city and defeating the combine forces that where dug in around the city your path leads you through the forest. Bunkers, trench systems, and tight tree formations await you in this open space. The woodlands and countrysides where not preffered targets for bombardments so the area will be rather clean of destruction but a lot of areas will be deserted wich makes for a great apocalypse setting.
Your task is to find a abandomned rocket station that was recently reactivated to shoot the starship into pieces but all tries had been a failure. Instead, a few volounteers are selected to enter a rocket and get shot into space to infiltrate the starship. And guess who one of these are. You.
While you try to ready the rocket together with the crew maning the station you will fight off waves of combine soldiers attacking the bunker. If the combine take the last remaining rocket they will destroy it, making it impossible to stop the incoming invading forces.

Chapter 3: Spaceship
Arriving in the rocket to the ship you decent into space and walk on the ship to find a entrypoint. The combine dont know you are aboard and its your goal to sneak around them and into the engine compartment. The rest of the crew will scatter around the ship and destroy various objectives. The enginecore will blow up the entire starship from the inside so its crushal not to attract attention while your on your way there.
Once your mission is over, head to the Troop Pod launchsite to get shot down to earth again. Expect heavy resistance on your way back since the entire ship will know that something is going on. In the starship you will encounter Guards as the main enemy, Regular soldiers around the barracks/Pod site and Officers at the more high valued targets.

(Storyline may change here and then when needed)

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