A popular high school tradition is drawing fresh warnings from California law enforcement as graduation season approaches.

The Redding Police Department is urging teens to think twice before taking part in “Senior Assassin,” a live-action game where high school seniors track and “eliminate” each other using water guns.

There’s an app-driven version of the game that assigns each player a target and uses phone location services to help them hunt each other down. The company behind it, Splashin, has urged safety when using the app.

A person holding a water gun points it at another person standing in a doorway.

The Redding Police Department is urging teens to think twice before taking part in the live-action game. TikTok/@splashin.app

Collage of three mobile app screens for a game called Splashin, showing a social feed, a chat interface, and a map for tracking players.

Splashin is a mobile app designed to organize “Senior Assassin” Apple

Players advance by soaking their assigned opponent while avoiding being eliminated themselves.

Police say the concept may be harmless, but the execution can quickly alarm the public and result in deadly consequences.

Sign up for the California Morning Report newsletter

California’s top news, sports and entertainment delivered to your inbox every day.

Thanks for signing up!

“Do not trespass, do not run into traffic and do not approach people in a way that could be mistaken for a real threat,” the department said in a Facebook post.

Officers also warned players to steer clear of schools, businesses and any area where their actions could cause fear or trigger a police response.

Two women laughing in a car as one holds a water gun, highlighting the

Players are instructed to use brightly colored water guns. TikTok/@splashin.app

A person in a baseball uniform holding a water gun and a baseball bat, with text

Police say incidents elsewhere have escalated. TikTok/@splashin.app

The advisory added: “No realistic-looking weapons in public. If someone tells you to leave, leave. If something feels off, walk away” and “use common sense and keep it safe.”

Sgt. Brian Berg noted that local students have played the game for years, describing it as a “fun tradition” tied to graduation, according to the Redding Record Searchlight

However, he acknowledged that many in the community may not recognize it, increasing the risk of misunderstandings.

While Redding police say they haven’t received complaints that are “overly concerning,” incidents elsewhere have escalated.


Download The California Post App, follow us on social, and subscribe to our newsletters

California Post News: Facebook, Instagram, TikTok, X, YouTube, WhatsApp, LinkedIn
California Post Sports Facebook, Instagram, TikTok, YouTube, X
California Post Opinion
California Post Newsletters: Sign up here!
California Post App: Download here!
Home delivery: Sign up here!
Page Six Hollywood: Sign up here!


Last year a student in Texas died of injuries after he fell off the back of a moving vehicle while playing the game and in 2024 two students had a real gun pulled on them in a Chicago suburb when a man with a concealed firearm confused the situation with a robbery.

School officials in the region are keeping their distance.

West Valley High School Principal Justin Byxbe confirmed the game is not permitted on campus during school hours and said there have been no water gun-related issues at the California school, according to the Redding Record Searchlight.

The modern version of “Senior Assassin,” a tradition dating back to the 1980s, includes rules aimed at reducing risk.

Players are instructed to use brightly colored water guns, avoid disguises and stay out of restricted areas like private property.

Still, authorities stress that even with safeguards, the sight of teens stalking each other in public, especially with anything resembling a weapon, can quickly turn a game into a public safety scare.