How do you beat the game infection 2 in under 750 days?

To beat Infection 2 in under 750 days, focus on optimizing your resource management and prioritizing essential upgrades. Engage in strategic battles to level up your character and unlock new abilities while minimizing unnecessary risks that could delay progress. Utilize effective crafting and trade strategies to gather essential supplies efficiently. Lastly, make sure to complete main quests and side missions swiftly to maximize your experience and resource gains.