You can give your players incentive to do things, but if it’s not the incentive they’re looking for they will probably demonstrate it by their in game actions. Some examples of player incentives include:
Good Robot Dev Blog
An ongoing series where I work on making a 2D action game from scratch.
What did web browsers look like 20 years ago, and what kind of crazy features did they have?
A look back at Star Trek, from the Original Series to the Abrams Reboot.
The Mistakes DOOM Didn't Make
How did this game avoid all the usual stupidity that ruins remakes of classic titles?
PC Gaming Golden Age
It's not a legend. It was real. There was a time before DLC. Before DRM. Before crappy ports. It was glorious.