Kalash rifle, Atomic Heart game, obtaining method, scavenging, combat loot, enemy drops, military crates, exploration, post-apocalyptic setting, Soviet aesthetic, robotic enemies, intense firefight, resource management, crafting materials, weapon upgrades, first-person perspective, dynamic lighting, immersive atmosphere, detailed textures, realistic physics, action-packed gameplay, strategic approach, survival elements, inventory system, character progression, skill tree, environmental interaction, narrative-driven exploration.