To get a map of the entire Gates of Zendocon universe, check out this article - Gates of Zendocon Universe Map.
Bonus LevelBonus level - To reach this level you need to go to the TRYX level first. In TRYX, the play area is restricted to the top half of the playing field, but there is a hidden entry that lets you fly through the floor. To access it, put your shields on at the start of the level and move down to kill the tanks. Then start dropping bombs to kill the aliens that start to appear. Eventually you should notice that your bombs are sinking through the floor - this is your hidden entry! Once you go through the floor and clear a few obstacles you will find the gate to the bonus level. Note that the bonus level exit gate will take you to the NERB level, which is technically back-tracking and you could in theory use this loop to play Gates of Zendocon forever (if your fingers survive that long!)
Level PasswordsLevel 1
BASE
Level 2
ZYBX
Level 3
XRXS
Level 4
ANEX
Level 5
NEAT
Level 6
YARR
Level 7
EYES
Level 8
NYXX
Level 9
ZYRB
Level 10
SRYX
Level 11
BARE
Level 12
STAX
Level 13
SZZZ
Level 14
RAZE
Level 15
TRYX
Level 16
STYX
Level 17
YARB
Level 18
BREX
Level 19
SEBB
Level 20
SNEX
Level 21
ZAXX
Level 22
BROT
Level 23
STOB
Level 24
XTNT
Level 25
BOTZ
Level 26
SNAX
Level 27
TRAX
Level 28
ZEBA
Level 29
ROXY
Level 30
NEXA
Level 31
NEST
Level 32
EBYX
Level 33
ZEST
Level 34
ZORT
Level 35
ROXX
Level 36
NERB
Level 37
TREY
Level 38
STAB
Level 39
SSSS
Level 40
RATT
Level 41
NYET
Level 42
BRAN
Level 43
XRAY
Level 44
TERA
Level 45
BYTE
Level 46
BETA
Level 48
STAB
Level 49
BOXX
Level 50
TENT
Level 51
NEAR
Level 52
ZETA