This "Addon" for Half-Life 2 is very cool. It has its own story and voice acting, own models and textures.
The story in Estranged: Act 1 is'nt that large, 90% of the game your by youself. You can find newspapers and other things on computers telling you about what has happened. The story is'nt set in the Half-Life world, which makes them have many new things to try.
The characters in Estranged: Act 1 have wonderful voice acting. The characters seem to give emotion to the player. The models for the humans arn't new, they are the same old citizen models. But for the zombies, they are new. The models arn't that bad, and also the zombies have a new animation. The animation is pretty good, but always room for improvement.
The new models in Estranged: Act 1 are well made. The models fit right in with the Half-Life 2 style. The new zombie, barrel and other models are fantastic. The new models give a new feel to the game, making a new experience for the player.
The new textures in Estranged: Act 1 are also well made. The look realistic and fit in with the Half-Life 2 textures. The new textures arn't only on the new models though, they are also on the floors, wall and roof.
In conculsion Estranged: Act 1 is a well made Addon for Half-Life 2. Even though the game is short, i recomend this addon for people who have Half-Life 2 already. It's not worth buy Half-Life 2 just for this addon because it's just to short.
This Game (Addon) gets a 8.5/10
Sorry for any spelling mistakes in this review.