One last example of how Valve has added a nice little 'icing on the cake' touch to this game is the optional 'Lost Coast style' commentary mode. Valve has really done a fantastic job making an already terrific game shine even more. I don't want to give away too many of the surprises and cleverly crafted situations in store when playing Episode 1, but I will say that the game manages to keep a refreshingly new feel to it, dropping you in pleasantly challenging situations that actually require a degree of thought and problem solving skill. There is a nice variety in the enemies this time around to keep things fresh, and you'll find yourself in more than one sticky situation, being attacked by many different types of enemies at once, even stumbling upon battles already in progress between the Combine soldiers, antlions, and the zombies. To add to their deadliness, the Zombine soldiers are armed with grenades, which tend to cause a lot of chaos. Such is the case with the 'Zombine' (named by Alyx, not me) soldiers, who were Combine soldiers now infected by headcrabs and move a great deal faster than the standard headcrab-zombies.

The enemies themselves are, for the most part, the same that you encountered in Half-Life 2 (Combine soldiers, Combine elites, snipers, gunships, zombies, the antlions, etc.) though there are some twists thrown in.

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