Class = explode

Kills the activator. This is done by calling the

P_ExplodeMissile()

routine, which basically kills a thing by changing its state to the death_state of the thing_type.

Line Type {
    ID = 5030
    Comment = "Kill the player if crossed"
    Flags = player_cross
    Flags2 = when_act | any
    Class = explode
    Count = 1
}

When the player crosses the line, he is killed.