Spaceflight
Star Tank
Aquarius 1: Missile Launcher, Pulse Hammer, Shield Module**
AQ map to S7A: Pheagon (ML), on to S49: Mega Pheagon (PH)
Additional AQ map with minor items on the way to PH
Subsequent AQ map with new minor items gained by PH
AQ map to S54: Crabbor (SM)
Scorpio 1: Explosives 1
AQ map to S38 switch, on to S15 switch, on to S70 SC entrance 1
SC map to S02 Iron 1, on to S20 switch, on to S64: Massive Ghoma/S63 Ex1
Additional SC map with minor items on the way to Ex1
Subsequent SC map with new minor items gained by Ex1
Additional map for AQ for new minor items gained by Ex1 (all I can think of is the Overdrive Adaptor. But hey, you can get it.)
Aries 1: High Jump, Fighter Cannon 2** (Corridor 1*)
AQ map to S36 AR entrance
AR map to S60: Ray Crystal (HJ)
AR map to S76 switch, on to S00 C1: Mecha Crab (FC2)
Additional AR map with minor items on the way to HJ
Subsequent AR map with new minor items gained by HJ
(Early Pisces)
Cancer 1: Fighter Blast 2** (Corridor 1*), Disintegrator Beam
AQ map to S09 switch, on to S41 CN entrance
CN map to S6E C1: Silk Sprayer (FB2)
CN map to S3D Iron 2, on to S3C switch
CN map to S2A switch, on to S28: boss*** (DB)
Additional CN map with minor items
Scorpio 2: Explosive Missiles, Dash Jets 1, Heart Container** (Corridor 1*), Scorpio Sting*
SC map from entrance 1 to S51 switch, on to S50: boss*** (EM)
AQ map to S0B SC entrance 2
SC map from S18 entrance 2 to S5D switch, on to S2A: Cactawhirl (DJ1)
SC map from S18 entrance 2 to S73 switch
SC map from S00 entrance 1 to S74 C1: SkeleSnake (HC)
SC map from S18 entrance 2 to S2F: ZP boss/S2E ZW
Additional SC map with new minor items gained by DB
Aquarius 2: Aquarius Bubble*
AQ map to S02: ZP boss/S03 ZW
Pisces 1: Fighter Jets 2*, Stun Beam (Corridor 1), Energy Max Up** (Corridor 2*)
AQ map to S00 PI entrance
PI map to S79: Crabbor 2 (FJ2)
PI map to S3D C1: Squidboss (SB)
PI map to S2F switch, on to S23 C2: Crushfish (EMU)
Additional PI map with minor items
Gemini 1: Grapple Beam 1, Overdrive Adaptor** (Corridor 1*), Fighter Cannon 3** (Corridor 2*)
AQ map to S07 switch, on to S67 GE entrance
GE map to S04: Iron 3/S14 switch
GE map to S64: Shield Armor (GB1)
GE map to S43 switch, on to S75 C1: Beam Platform (OA)
GE map to S79 C2: FlameSkull (FC3)
Additional maps for AQ, PI, AR for new minor items gained by GB1
Scorpio 3: Wallet 1** (Corridor 2*)
SC map from entrance 2 to S0F C2: FlameSkull 2 (W1)
Aries 2: Aries Saber*
AR map to S50 switch, on to S08: ZP boss/S18 ZW
Leo 1: Repair Module 1**, Double Jump Boots
AR map to S50 switch, on to S0B LE entrance 1
LE map to S19 switch
LE map to S62: Magnet Man (RM1)
LE map to S05: Mainframe/S06 DBJ/S09 switch
Additional LE map with minor items
Additional maps for AQ, SC, AR, CN, PI, GE for new minor items gained by DJB
(Early Libra)
Cancer 2: Cancer Splatter*
CN map to S7A switch, on to S60: ZP boss/S70 ZW
Pisces 2: Pisces Spread*
PI map to S6F: ZP boss/S7F ZW
Gemini 2: Advanced Comsat 1**, Gemini Twin*
GE map to S3F AC
GE map to S4F switch, on to S7E: ZP boss/S7F ZW
Taurus 1: Repair Module 2**, Missile Pack** (Corridor 1*), Black Hole Armor**
GE map to S1A switch, on to S4C TA entrance
TA map to S21 RM2 -409e
TA map to S15 C1: Megamagma (MP)
TA map to S3D: Ray Crystal 2 (BHA)
Additional TA map with minor items
Libra 1: Sidearm Rapidshot** (Corridor 1*), Explosives 2**, Wallet 2**, Ice Beam
CN map to S6A LI entrance
LI map to S76 C1: SubZeroCutter (SR)
LI map to S34 Ex2 -380e
LI map to S12 W2 -409e
LI map to S42 switch, on to S19: boss***, on to S2F: Massive Ghoma 2/S1F IB
Additional LI map with minor items
Cancer 3: Overdrive Adaptor** (Corridor 2*)
CN map from S6A entrance 2 to S6D C2: Grimgrin (OA)
Taurus 2: Wall Cling Boots
TA map to S0F switch
Additional TA map with minor items above/beyond S4E
TA map to S08 Iron 4, on to S09: Vector Defence, on to S0A WCB
Additional maps for SC, AR, CN, PI, LI for new minor items gained by WCB
(Early Virgo)
Gemini 3: X-Ray Scope**
GE map to S06: boss***/S05 XRS
Libra 2: Libra Crystal*
LI map to S61: ZP boss/S62 ZW
Leo 2: Energy Dynamo 1**, Super Missiles (Corridor 1)
LE map to S54 ED1
LE map to S18 switch, on to S0D: Big Tank, on to S0F cutscene, on to S5F C1: Cruiser 2 (SM)
Additional maps for AR, GE, TA, LI for new minor items gained by SM
(Early Capricorn)
Taurus 3: Taurus Flame*, Fighter Jets 3** (Corridor 2*)
TA map to S2F switch, on to S51: ZP boss/S40 ZW
TA map to S79 C2: Tentacle Armor (FJ3)
Gemini 4: Energy Dynamo 3**
GE map to S2B+Inside ED3
Virgo 1: Stomp Boots**, Fighter Blast 3* (Corridor 1*), Virgo Whip*
SC map to S1A VI entrance
VI map to S2B switch, on to S37 switch, on to S44: Cactawhirl (SB)
VI map to S79 C1: SilkSprayer 2 (FB3)
VI map to S35 switch, on to S54: ZP boss/S53 ZW
Additional VI map with minor items
Capricorn 1: Anti-Gravity Device, Capricorn Wave*
PI map to S03 CP entrance
CP map to S14 switch
CP map to S2D switch, on to S4D Iron 5, on to S4E AGD
CP map to S64 switch, on to S03 switch, on to S6F: ZP boss/S7F ZW
Additional maps for AQ, GE, LE, LI, CP for new minor items gained by AGD
Leo 3: Leo Lazer*
LE map to S2B ZP boss/S2C ZW
Aquarius 3: Life Tank (9)** (Corridor 1*)
AQ map to S56 switch, on to S7F C1: Fungual Orb 2 (LTx9)
?????? 1: ??????
?? Map to S3B
Aries 3: Voltiac Key, Heart Container** (Corridor 2*)
AR map to S05: boss***/S04 VK
AR map to S3C C2: Cloak Wing (HC)
Additional maps for new minor items gained by Voltiac Key - are there any?
Warp Zone
It's probably pointless to provide a map of the Warp Zone (since it's pretty self-explanatory) nor the locations of the warp gates scattered throughout the Zodiac, since all of them will have appeared within the preceding maps in the guide somewhere before this point. While six of them are reasonably well hidden, the other five are out in the open and likely for a thorough explorer to stumble across before acquiring the Voltiac Key. None of them lead to new areas to explore. So perhaps just a note here with a picture of one and explanation what they're for, and that the player can access all of them upon gaining the Voltiac Key.
Libra 3: Dash Jets 2, Energy Dynamo 2** (Corridor 2*)
LI map to S3D Laserbeam, on to S6E: Squidboss 2/S5E DJ2
LI map to S7D switch, on to S0D C2: Cloak Wing (ED2)
Additional maps for AR, CN, LE, TA, VI, CP, ?? for new minor items gained by DJ2
Aquarius 4: Overdrive Adaptor** (Corridor 2*)
AQ map to S06 C2: SubZeroCutter 2 (OA)
Aries 4: Repair Module 3**
AR map to S3E+Inside RM3
Pisces 3: Grapple Beam 2**
PI map to S72: SilkSprayer, on to S74 GB2
Virgo 2: Fighter Cannon 4** (Corridor 2*), Spin Attack**
VI map to S63 switch, on to S0F C2: Fungual Orb (FC4)
VI map to S7A switch, on to S50: Crabbor 2/S51 SA
Additional maps for CP, ?? for new minor items gained by SA
Scorpio 4: Supernova Armor**
SC map from S18 entrance 2 to S4E: Mega Pheagon 2/S4D SNA
Pisces 4: Explosives 3**
PI map to S06+Inside Ex3
Capricorn 2: Overdrive Adaptor** (Corridor 1*),
CP map to S67 C1: Tentacle Armor 2 (OA)
?????? 2: Infinite Jump Boots*, Zodiac Changer**
?? map to S1D: SkeleSnake 2, on to S2E IJB
?? map to S0F: SkeleSnake 2/S0E ZC
Additional ?? map with minor items
Leo 4: Heart Container** (Corridor 2*)
LE map to S00 C2: Mecha Crab 2 (HC)
Capricorn 3: Fighter Cannon 5** (Corridor 2*)
CP map to S0F C2: Grimgrin 2 (FC5)
Aries 5: Dr. Mo
AR map to S66 Dr. Mo
AR map from S66 to S35 LE entrance 2
LE map from S7F entrance 2 to S1F Pandora flight
Pandora flight
Pandora: Boss
PA map to final boss
* Optional, but required later
** Optional, and not required
*** Not sure what the boss's names are
Advanced Comsat 2 needs to go in there somewhere - haven't found it yet, so no clue where it goes. Never mind if it's not a main-sequence item, I guess.