Electrocop
Platform: Atari Lynx
Region: USA
Media: Cartridge
Controller: LYNX Gamepad
Genre: Action > Adventure 
Gametype: Licensed
Release Year: 1989
Developer: Epyx
Publisher: Atari
Players: 1
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Today, if a daughter of the President goes missing, I would look in the nearest bar. However, in the near future, the explanation is that she's been kidnapped by a Criminal Brain robot, and held in a booby-trapped lair. As the advanced hybrid Electrocop, your task is to rescue her within an hour.

Gameplay involves working your way through the complex warehouse maze, unlocking coded door along the way. Extra weapons can be collected to help dealing with the drones. There are also computer terminals to buy new weapons - these also have simple subgames built in. What makes the game unique, and intended as a showpiece for the Lynx hardware, is that full 3D is used, so that the character walks in and out of the screen as well as across it.

Hints:

Crash the Game - To crash the game go to either level 5 or 9 and get as many programs hacking the door codes as possible. It may be best to set the code to the one over the actual code (See above) so the program won't find the code too soon. 

Level Select - Turn off your sound at title screen, now hold up and left on the joypad and keep tapping both A & B buttons until it says "LEVEL 1" instead of "NOW TELEPORING TO LEVEL 1". Use joypad to choose level.

Door Codes 

Level  1  D1 = 2473 -> Level 2       Level  7  D1 = 6021 -> Level 4
          D2 = 9874 -> Level 2                 D2 = 5824 -> Level 9
          D3 = 8743 -> Weapons
                                        Level  8  D1 = 7698 -> Level 6
Level  2  D1 = 3287 -> Lvl 7 (Right)
                       Lvl 3 (Left)  Level  9  D1 = 0170 -> Pla.Cannon
          D2 = 5409 -> Empty                   D2 = 1092 -> Empty
                                                  D3 = 7102 -> TriLaser
Level  3  D1 = 9284 -> Level 4                 D4 = 4726 -> Empty
          D2 = 7210 -> Level 4                 D5 = 1375 -> Level 11
          D3 = 3936 -> Smart Bomb              D6 = 2857 -> Bi-Laser
          D4 = 7395 -> Plasma Cannon           D7 = 6998 -> Tri-Laser
          D5 = 8294                            D8 = 1798 -> Tri-Laser
                                                  D9 = 4321 -> Level 1
Level  4  D1 = 0394 -> Weapons
                                       Level 10   Left Exit -> Level 11
Level  5  D1 = 8658 -> Weapons               Middle Exit -> Level 9
          D2 = 5462 -> Door 7                 Right Exit -> Level 2
          D3 = 9973 -> End of Game
          D4 = 7642 -> Door 1       Level 11   D1 = 0293 -> Bi-Laser
          D5 = 0912 -> Door 2                  Left Exit -> Level 3
          D6 = 0974 -> Door 3                 Right Exit -> Level 12
          D7 = 7865 -> Door 4
          D8 = 4285 -> Door 5       Level 12   D1 = 2987 -> Pl.Cannon
          Stingrays -> Level 10                D2 = 6473 -> Pl.Cannon
 Open/Closing Doors -> Level 1
Level  6  D1 = 9722 -> Level 5
          D2 = 8765 -> Level 12 

http://www.atariage.com/software_hints.html?SoftwareLabelID=1863
http://www.mobygames.com/game/lynx/electrocop