Complex sentence: Unlike games such as Left 4 Dead, Class3 will focus more on the surviving aspect, such as stealth, evasion, distractions, securing your resources, and moving through the world in a realistic way will be more prominent than combat with the zombies.
Split into simpler sentences: Unlike games such as Left 4 Dead, Class3 will focus more on the surviving aspect. Stealth, evasion, distractions, securing your resources, and moving through the world in a realistic way will be more prominent than combat with the zombies.