Senior assassin is how graduating high-school seniors spend spring. One organizer sets up the game, you get secretly assigned a target to eliminate with water, and the moment you eliminate them, you inherit their target, creating a one-way chain that collapses until one player remains. The game runs parallel to normal school life, which is what makes it work.

What senior assassin actually is

Senior assassin is a spring elimination game played by graduating high-school seniors, mostly across the US. It is student-organised, not run by schools. Players are secretly assigned another player as their target and eliminate them, usually with water. When you eliminate your target, you inherit their target. Your target's target becomes your new target. This inheritance creates a one-way chain that keeps collapsing player by player until one person is left alive.

The game goes by different names depending on where you are: Senior Water Wars, Senior Splashin', Senior Tag, Paranoia. The core mechanic is identical everywhere, but rules vary school to school because there is no governing body, no official rulebook, and no external control. Your organiser writes the rules. What counts as an elimination in one town might not count in another. That variation is part of why the game stays interesting across different regions.

The organiser sets up the game

Someone in your grade volunteers to run it. They gather the player list (usually 20 to 50 students), collect agreement from parents that this is happening, and write or adapt a rulebook. The organiser needs to decide several things upfront: Are there safe zones (home, school, work)? What counts as an elimination (water balloon, spray bottle, bucket splash)? How many ways can you eliminate someone? Must you tag them, or can you splash from a distance? What happens if someone quits or moves away mid-season?

Once the rulebook is written and agreed, the organiser creates the one-way target chain. This is where the secrecy happens. If you listed targets randomly, players could figure out who they were by comparing notes. Instead, the organiser needs to build an unbreakable chain where each player hunts exactly one other player, and each player is hunted by exactly one other player. That is why a target chain generator is essential. It takes your player list and builds the chain cryptographically so nobody can reverse-engineer it.

You get a secret target

The organiser shares a class code with your group through text, Discord, group chat, or however your grade communicates. You join the live game board. You enter your unique code. The board displays one name: your target. That is all you know about the game structure. You do not see who is hunting you. You do not see who is hunting them. You do not see how many players are left. You see only the one person you need to eliminate.

This extreme secrecy is the whole game. Because you cannot see the chain and nobody can see you coming, you have to stay alert. Your target could be anywhere. Anyone could be hunting you right now. The psychological pressure is constant but the weapon is just water, which keeps it playable instead of stressful.

• Your target is the only person you know for certain you need to eliminate.
• Everyone else could potentially be hunting you.
• You find out who was hunting you only after they eliminate you.
• The chain structure means exactly one person will be hunting each player.

Eliminating your target

Once you have your target's name, the hunt begins. You learn their schedule. You find out where they work, when they go to the gym, what their route to school looks like. You coordinate with friends who might have easier access. You time your attack for a moment when they are vulnerable but also when you can actually execute the elimination cleanly. You stalk them until the opening arrives.

When you catch them, you eliminate them according to the rules your organiser wrote into the rulebook. Usually this means splashing them with water in some form: a water balloon, spray bottle, soaking them from a bucket, or a water gun. The exact definition of elimination matters enormously, which is why your rulebook has to specify it precisely. Does the water have to be visible? Does their shirt have to be soaked or does a handful count? Can you eliminate them if they are at work and would soak the store? Read what counts as an elimination before your game starts, because arguments over the definition of elimination ruin entire seasons.

You inherit your target's target

The moment you successfully eliminate your target, you report it to the organiser, usually with some proof like a photo or video. The organiser confirms that the elimination was legal under the rulebook, then updates the live game board. Your target's name disappears from your screen. A new name appears: the person your target was hunting. That person is now your new target.

This inheritance mechanic is what keeps the game moving forward. One player eliminated means the one-way chain shortens by one person. The game naturally accelerates because eliminations cascade through the chain. A player who looked safe for weeks, hiding far from any known hunters, suddenly becomes vulnerable because two other eliminations happened upstream and the chain rewired itself. The psychological state of being the last target is intense.

• Eliminate your target, you immediately inherit their target.
• Your target was someone's target too.
• When you are eliminated, you are completely out of the game.
• The person who eliminated you receives your assigned target and hunts begins anew.

Safe zones protect you sometimes

Your organiser's rulebook defines places where elimination is not allowed. These safe zones are usually home, school during school hours, work, or family gatherings. Safe zones exist to keep the game playable while life happens. Without them, players would have to choose between their job, their family dinner, or getting splashed, which is not a real choice and puts parents in a position of having to pull their kid from school.

The trick is writing safe-zone rules that actually work. A common mistake is making safe zones too broad, so nobody can get eliminated anywhere important and the game stalls completely. Another common mistake is forgetting major safe zones like work, then players feel unsafe during their jobs and quit. Yet another mistake is not defining whether a car in a parking lot counts as home or not. Read senior assassin safe zones before your organiser finalises the rulebook. A strong safe-zone list prevents most mid-game arguments, keeps people playing, and makes the game fun instead of frustrating.

The chain collapses to one player

Eliminations happen steadily over four to six weeks as players successfully hunt down their targets. The pace accelerates as the chain gets shorter. A climactic moment comes when one player remains alive and nobody is hunting them. That player is the winner. They did not get eliminated, which means nobody was hunting them, which means nobody was hunting their target, which means the entire one-way chain had to collapse perfectly into that single survivor.

Some organisers award a prize: money, a parking spot, public recognition, or bragging rights. Some do not give anything at all. The satisfaction of being the last player alive is sometimes prize enough. Chris's rule for seniorsassassins.com: if you run a game using our tools, you keep all prize money and all decisions about prizes. We keep the game free forever, but what you do with your own victory is entirely your call and your reward.

Tools make the game actually playable

Running this game by hand with spreadsheets, group chats, screenshots, and manual updates is a nightmare. Somebody always loses their target name, players coordinate wrong, or the organiser makes a mistake updating the chain. That is why seniorsassassins.com exists. The site gives you three essential tools, all free and completely private.

First is a rules template where your organiser fills in your specific rulebook and publishes it. This mint a shareable class code. Second is a tool that takes your complete player list and builds the cryptographic one-way target chain. Third is a live game board where each player enters their unique code and sees only their own target's name. No login, no download, no fees, no data collection. The organiser shares the class code with your group however they want. Players join with their unique code. That is it. The site stores nothing about you in readable form because it uses browser encryption, not a server that keeps your names and details.