On April 24, 2018, Minnesota State Representative Rick Hansen (MN Democratic-Farmer-Labor Party) introduced a bill, MN HF 4460, which would prohibit the use of loot box mechanics in games sold to anyone under 18 years old.   The bill would also prohibit including loot box mechanics in any updates to an already-existing game without verification that the recipient of the update is at least 18 years old.   Moreover, the bill would require such games to carry a warning that reads:  

This game contains a gambling-like mechanism that may promote the development of a gaming disorder that increases the risk of harmful mental or physical health effects, and may expose the user to significant financial risk. 

The bill has yet to be adopted by the Minnesota legislature or signed into law.