Cross-Platform Action/Adventure Game Development

I need an action/adventure gaming app developed for both iOS and Android platforms. The game should be in first-person perspective.

Key Requirements:

- Experience in developing action/adventure games, preferably with a first-person perspective.
- Proficiency in mobile game development for both iOS and Android platforms.
- Strong skills in 3D modeling, animation, and graphics design.
- Knowledge of game mechanics, level design, and user experience.
- Ability to integrate in-app purchases and ads.
- Strong problem-solving skills and creativity.

Ideal candidates should have a portfolio showcasing similar projects and a passion for gaming. Please share your relevant experience and approach.