Open World Game Ideas

Hi everyone, I feel like creating an open world game (similar to LT2). These games are fun as they don’t have a set way of playing the game, and your only limit is your imagination. If I were to make an open world game, would you by any chance have any ideas for a certain theme?

deep ocean exploratory oil drilling tycoon


Thanks! That sounds like a nice idea

Hidden cities in the center of the earth?