Type 1982GONZO 
Press Ctrl+I You Are Invincible 
Pree Shift+V Trace User
Shift+X Teleport
Ctrl+Shift+N End Mission

Jindrich Vyskocil

Level 15 5QWDN Level 16 KQIPY Level 17 AI4PD Level 18 H40JF Level 19 FDGJ7

DareDevil

I played it to the fourth mission... and here are the passwords : 4JJXB : second mission 4MD1T : third mission GDNCQ : fourth mission

Naum

during the game type in 1982GONZO then you can activate this cheat: Shift+X Teleports you anywhere you want Ctrl+Shift+N go to the next mission automatically Level 16 CA4PD Level 17 4JOJF Level 18 CDGJ7 Level 19 the final level 3MKWI

Andrew McGrail

Level codes for Commands: Behind Enemy Lines Level Code 2 4JJXB 3 ZDD1T 4 RFF1J 5 K4TCG 6 DT1WN 7 IH3W1 8 52WJ7 9 924BF 10 PSGPW 11 JF0P3 12 4MB4D 13 BJK4Y 14 TI8D1 15 XQWDC