Mine

on *:TEXT:!magicnumber*:#:{
  if(%gameison == $no)
  /set %randnum $rand(1,100)
  /set %gameison $yes
  msg $chan $me is thinking of a number can u guess it? *hint* My number is 1-100.  
  if(%gameison == $yes)   
}  
on *:TEXT:!magicnumber*:#:{
  if(%gameison == yes)
  msg $chan There is already a game going on $nick !!
}
on *:TEXT:!guess*:#:{
  if($2 != %randnum)
  if(%gameison == $yes)  
  msg $chan sorry $nick that is not the correct number keep guessing!  
}
on *:TEXT:!guess*:#:{
  if($2 == %randnum)
  if(%gameison == $yes)
  msg $chan Congratulations $nick !! the magic number was %randnum ! well done!
  /set %gameison $no
}