This mod continues the story where Half-Life 2 finished and offers one possible scenario. After the big explosion you fall to the ground and are very badly injured. Some people find you and take you home to a small village outside the city where the citadel was built. After 3 months you’re strong again and want to fight on. You have never seen Alyx or any of the others since the explosion. But you try to find new people that will fight with you against Breen. Nobody wants to help, some are afraid, others think that Breen has learned his lesson and won’t start again. It also seems that most of his organisation was lost in the explosion. Then you hear that along the coast Breen is starting again and trying to take control again. So you decide to go to the coast. There you take a little boat and go along the coast so the Combine won’t notice you coming.
Similar to the mod "Strider Mountain", Coastline to Atmosphere struggles to entertain after playing the first few chapters of the game. While the beginning is very entertaining with dynamic combine fights and jeep chases, the rest of the game becomes mediocre as the same repetitive gameplay takes over. The environments, while appealing at first, start to become lackluster, and the gameplay on all fronts begins to fall short. This was also caused by very confusing, tedious, mission objectives, that proved more aggravating than fun. Despite all of its flaws, Coastline to Atmosphere is still a decent Half Life 2 mod, so long as you play it for its beginning. The devs should stick with the concept they started with "Strider Mountain" and recreate the same gameplay from the beginning of that mod into a full length game. That would seriously make the game a whole lot better, as I absolutely loved the first couple chapters of "Strider Mountain". In the end, good effort to the devs for making such lengthy mods, but you guys need to work on the quality of the entire experience, not just the beginning. Final verdict for Coastline to Atmosphere: 7.2/10