> Alright, so for the past year or two, I've been wroking on my SMASH masterpiece. I only have the first chapter done.
>
> In any case, I plan on creating five chapters (I'm almost done with the second; and, as long as I keep wroking on it faithfully, it should be finished within the month). I have plans for the first four, but my fifth is hard to place. I know I'm being vague, but I'd like a theme or place that you would like to see in an adventure game. I've got the plot down, as well as the characters, just not the setting for the fifth chapter. I'm opening up for any suggestions you guys might have.
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> This is a way to influence my game! So please help me!

How about a theme park?

You could interact with mascots, dangle perilously after falling out of a ferris wheel chair, lose/hide things, etc. You could even work there and have to accomplish tasks by finding your way around, transporting stuff in one of those motorized carts.

It's big enough to accommodate any plot. If you need a certain setting, just have a ride set up with it. Also, there could logically be an endless supply of inventory items you might need.

Good luck!