Hey there! As a Final Fantasy VII strategist, I can share some tips to help you master the game.

When it comes to materia management, make sure to prioritize leveling up your magic and support materias like Elemental, HP Absorb, and MP Absorb. These can give your characters an edge in battles. Don’t forget to link materias for combo effects!

For mission walkthroughs, always be prepared with a well-balanced party. Use Cloud as your physical attacker, Aerith for magic support, and Barret for long-range attacks. Explore each area thoroughly to find hidden items and secrets.

When it comes to character development, focus on unlocking each character’s Limit Breaks by using them in battles. Also, make use of the AP gained from battles to level up your materias and unlock new abilities.

Remember, practice makes perfect in Final Fantasy VII. Good luck on your journey through Midgar and beyond!