A first person survival-base building game that involves crafting and creating unique items and tools
This is an idea I have loved to see for a while, most games involve crafting pre-planned tools and items leading to incredibly linear progression in what should be considered a sandbox game. This concept would be rather than having a crafting menu and just matching shapes, you would use gathered materials to create unique tools with different materials functioning in different ways as well as shapes controlling how tools can interact. This would allow for a more interesting and realistic way of progressing as you could make a stick pointy for hunting or know sharp edges into rocks to cut trees. You could eventually progress to getting copper and magnetite to create electricity and motors to make power tools or even use liquids and solids as fuel to start making vehicles. The idea would probably function best for be as unique motions and contact would work very well for shaping and breaking materials. This style of game is something I have seen many people looking for and I would love to see it come true.
Edit: The material would be shaped and formed by hand leading to an interesting experience with crafting rather than placing pieces of material into a shape, stuff would need to be bound or attached together to make more complex tools such as pickaxes.
Edit 2: It would also probably be important to add “Miracle Metal” style resources to reduce the difficulty of complex machines and allowing the player to reach a futuristic state. Multiplayer could also be cool as it could allow for diversity in tasks.