ID:50129
 
What is one success of Animal Crossing that keeps people entertained? Why it is simple...

Collecting!

The museum, matching house theme, etc. People love to collect things - but more so - people love being famous.

For example, in Animal Crossing, if you donate an item which they didn't have (ex: certain fossil/bugs/fish/etc), they put it in display... along with the name who donated it! It could even mention the name of your friend that donated something so you are not alone!!

Anyways, that is a simple game idea to keep players into your game... offer them something to collecting, such as collecting stamps/coins/cards, an equipment set (and offer bonuses as a small incentive)...

And try to make them famous somehow - such as the museum does in Animal Crossing and something like a collector club or something...

That is one way to keep players when you feel like there's nothing else to add to your game :D
I find myself addicted to games when there is a lot of stuff to unlock which are "cool" and amazing. Usually, as long as those things you have to unlock don't take up a huge chunk of your time, it's worth unlocking.