Hello,
Im going to make Post apocalyptic rpg, and I want to know what you like to see in the game. Ideas and another stuff it will be something to Fallout series and rage.

Tileset show:

This site held a competition recently for creating post apocalyptic games so I'd recommend finding that thread and downloading a few of the entries for ideas.
But yeah, one of the great ideas of the fallout series was how they tied it to reality by including real life landmarks. Sorta like when you see the tip of the statue of liberty sticking outta the ground in planet of the apes. Obviously, that'll be a struggle to perform visually with RM software but I'd recommend trying something similar, even if its just something as little as saying 'its <place> in <future date> though you wouldnt recognise it after the bomb dropped' in the opening sequence

I'll have to look at this thread regularly since I'm working on a similar project, although I'm aiming for a more Lovecraft-ian apocalypse.

/me goes to look for apocalyptic game competition thread

I cant find the competion... I just know the game 'Fiding Eden"

All of the older competition topics were places in the Noteworthy Topics area of the forum once the Competition Zone was removed.
Finding Eden is the winning entry for that competition, but the competition topic doesn't have the download links for those games any more.