You can level up your character by completing missions and challenges throughout the game. Each completed task earns you experience points, which contribute to character leveling.

The game features various mission types including storyline missions, side quests, and bounty missions, each offering unique rewards and experiences.

Improving weapons involves collecting resources that can be found throughout missions. Use these resources to upgrade your weapons in the game's upgrade menu.

Unlocking new locations requires completing specific storyline missions that often involve reaching a certain level or fulfilling particular objectives.

For challenging missions, consider leveling up your character and weapons first, strategizing your approach, and utilizing cover effectively during gunfights. This can significantly improve your chances of success.