From: okwow@abest.com

The line of Fire

or Presidential Assasination.

This game was a deriviative of a game someone had played on a lasertag 
field, it's called Presidential Assasination, and we started calling it 
Secret Service, or Line of Fire. It requires at least 6 players to make 
it anything, but more is much better. One player is chosen to be the 
President, he or she choses the secret service agents who will keep him 
alive. If there are only 6 players, the Pres only gets one secret service 
agent. If there are, and this is better, 16 players, than it can be 3 
secret service agents. The other players have but one goal, Kill The 
President! The Pres and the Secret Service have two ways to win, 1.) Keep 
the pres alive for the 15 minutes that the game runs, or 2.) Escort the 
pres to the safety of a predetermined flag station. That flag station can 
 be secret, known only to the Pres and Secret Service agents, or floating
and set by the ref after the game starts, or known to both teams, which 
allows for the assassins to lay a trap. 

We like it. It's short and can be tricky. As a Secret Service agent, I 
had one of our agents run loudly and conspiculously upfield whilst we 
retired to a defensible area in another corner of the field, we almost 
escaped unscathed, but won. Other games saw agents laying atop the 
pres trying to save his butt. Often the Pres was shuttled away from the action 
and exhorted to "keep down!!!"