Zombie Edition is a mod based on original half-life concept, but you will play as a headcrab and, what is more interesting, as a zombie. Zombies can mutate to change their characteristics into three types and every type will have at least six upgrades including new weapons and abilities. For further information please check this mod's Official Page.
Mod great! No, it does have disadvantages, such as the fact that he is a bit short ... And ... all ?! Is mod so gorgeous ?! And my answer is YES! How else, if he gives us the opportunity to play for such an enemy, of the legendary game Half-Life as headcrabs! What else do you need for happiness? Right! Pumping the character, right up to three classes: Crusher; Rascher; and Breeder. All three classes can be pumped, devouring the wretched fellows. Once the modification is complete headcrabs simulator, and a history of the universe Half-Life. To play it, you will not regret!