Pokémon Go has been a huge hit since its U.S. release Tuesday, July 5.
The game places characters in real locations across the world for players to catch.
Many players have been on the game nonstop, with their eyes glued to their cell phones.
Denver is not immune from the hysteria.
Monday night there were over 30 people at the State Capitol downtown trying to catch Pokémon, but it’s not all fun and games for everybody.
Some restaurants have had enough of people walking in trying to catch the characters.
Owners are now posting signs asking only customers to play at their restaurants.
In Missouri, police say three suspects lured players to certain areas and robbed them at gun point.
Denver Police are now urging users to be cautious while playing.
“We would just encourage people have fun with it, be safe, be respectful of people's property and just be alert, whether you are driving or walking,” said Denver Police spokesperson, Doug Schepman.