You play as Number 42, a Combine soldier sent to kill Gordon Freeman.
Maps and mods that contain an Airboat.
Surprise, surprise, you need to escape from a prison. Find the key to your cell and your journey will begin.
Look everywhere and don’t leave any crate unturned.
You even get to drive the airboat, if you can get that far, that is.
12th October 2009
5 Comments and 3 recommendations, most say "Maybe?"
Caught by the remaining Combine, Gordon Freeman must escape to rescue his imprisoned rebel allies. Aided by the resourceful Dawn and her insurgents, you are sprung from captivity in order to spearhead a staged breakout from the notorious Port Halen Prison.
But before you can get there you must loose your Combine pursuers and make your way through a wilderness long since overrun by the zombified.
9th October 2007
26 Comments and 15 recommendations, most say "Play It Now!"

Using the airboat and stopping off at certain points, the player must use the sewers to bypass a Combine blockade
17th June 2009
8 Comments and 7 recommendations, most say "Play It Now!"
UPDATED
This mappack has now been updated based on feedback received via PlanetPhillip. I have uploaded both the updated maps and the complete mappack.
1st June 2008
60 Comments and 39 recommendations, most say "Play It Now!"
Author’s Notes: “This is a single player Half Life 2 mod, set entirely outside of City 17. It features 6 levels of action, exploring a range of locations, non-linear level progression, a musical score, some new abstract textures and challenging gameplay. This mod is meant for those who have already completed Half Life 2″
10th September 2008
13 Comments and 15 recommendations with no significant bias
You find yourself in an alley that leads to a small trainstation.
From there you need to follow the clues and reach a specific point.
Be careful because your way is blocked at certain points and the use of the airboat is recommended, although not required.
27th July 2009
7 Comments and 6 recommendations with no significant bias
Jump into the portal and reach the 3 fighting Striders. What else can I tell you? The first and only speech is in Russian but you don’t really need to know what he says. Just run, think, shoot and kill!
25th January 2009
14 Comments and 6 recommendations, most say "Maybe?"
The Citizen is set parallel to the events of the original Half-Life 2. The player takes the role of an ordinary man, pushed over the edge by the oppressive regime controlling his life.
21st February 2008
490 Comments and 237 recommendations, most say "Play It Now!"
19th March 2009
47 Comments and 22 recommendations, most say "Play It Now!"