Moving your character to the middle of the screen makes the computer
 move the screen down 1/3 the way to show more of what's above you.  A
 good technique I have used is to move till the screen shifts and then
 move back down to plan my attack.
 
 You start with a repeating type rifle that also shoots a grenade if
 you hold down the fire button.  The bullets seem to have a life of
 only 1/3rd of the screen.
 
 Watch for special areas that light up when destroyed that give you
 more ammunition.  Also don't forget to make use of the occasional
 tank that you may happen upon.  Don't forget to get out of it when it
 catches fire.
 
 Bonuses found when you blow up installations or the red suited men:
 
 K       Smart bomb
 B       High power grenades
 L       Longer range bullet
 S,A     Shorter shot
 F       Faster bullet rate of fire.
 
 BACKDOOR TIME:
 
 When you have a high score, instead of typing your name, type
 "FREERIDE" and press the RETURN key.  Now when you play the game you
 should be invulnurable.
 
 When you enter the first tank, crash into the first pillbox.
 Immediately press the F1 key to end the game.  Restart and do it
 again, now your tanks will have shields.
 
 Also pressing the space bar allows your man to hide in the folliage on
 the far right and left.  It also fixes the tank barrel and operates as
 anfixed and unfixed toggle.