"They Hunger" is a popular Half-Life mod known for its intense survival horror elements. It's not a single, monolithic mod, but rather a series of modifications, with the most notable being **They Hunger v1.1 and the standalone sequel, They Hunger 2**. These mods are characterized by: * **Survival Horror Emphasis:** They prioritize atmosphere, resource management, and relentless enemy encounters over traditional Half-Life combat. Ammo and health are scarce, and the enemies are often terrifying and unpredictable. * **Unique Monsters:** The mods introduce new creatures with distinct behaviors and abilities, adding to the unsettling atmosphere. * **Challenging Gameplay:** The difficulty is significantly higher than the base Half-Life game, requiring players to carefully plan their actions and conserve resources. * **Atmospheric Environments:** The mods utilize the Half-Life engine's capabilities to create creepy and unsettling environments. If you're looking for a scary and challenging Half-Life experience, "They Hunger" is a well-regarded choice for fans of survival horror. Just be aware that it's considerably harder than the original game.