The Half Life Episode One indeed the half life 2 with some new item.same environment and same characters.
Publisher and Developer of game usually make the continuance for the game for 2 proof:1- avocation the more money.2- answer the mysterious questions in the previous version.
The gameplay of half life two episode one is amazing. the game have so many difficult puzzle and more dither but don't afraid Mrs.alyx help you to contiue you way and finish game.the point is so marvelous is the infinite ammo of her gun. you must use the gravity gun to untie the puzzle. section of driving in episode one is so terrible.
the sound of episode one is good and perfect. the sound make with enemy and you is so good and make the intersting barley. the sound of blast,fire,walk and............ is amazing. if you see the face of characters when he or she speaking you can see motion of their face.
howmuch we talk about the graphic and face of characters yet we little say. the engine of episode one is performance than half life 2. game maker excess so many new technology to game for example: Bloom.HDR. The menu of game is same menu we see in half life 2. the effect of fire.water and ...........in game is amazing. through use the HDR technology in game(if your card support it) environment of game is perfect and better than half life 2. the shadow in game in best position.
The AI of episode one isn'i good to enough. the enemy of is: soldiers.combine.striders.zombies.head craps. stlakers. antlion. the enemy AI is better and half life two but isn't good. the weapon isn't change in game whether for you whether for enemy.
the half life episode one is short and bettwen 4 and 5 o'clock. so many american gamers protest for the expensive price of game but episode one value to play once.