Fields marked with "-" contain boolean values: 1=yes, 0=no. Probabilities are given in percent in most cases.

 +0     WORD    Recycle Rate for "Colonize" mission, %
 +2     WORD    Odds of a meteor
 +4     WORD   -Minefields (independent of Web Mine setting)
 +6     WORD   -Alchemy ships
 +8     WORD   -Delete old messages
--- the Host 3.00 HConfig ends here ---
+10     WORD   -Disable passwords
+12  12 WORDs   Ground combat: Attack ratio for each player
+36  12 WORDs   Ground combat: Defense ratio for each player
+60  12 WORDs   Free fighters on starbase per turn, for each player
+84  12 WORDs   Mining rates for each player (50..500%)
+108 12 WORDs   Tax rates for each player (50..500%)
                These fields contain 12 words. The first word in each range
                is 0, the remaining 11 entries contain the data.
+132    WORD   -Rebels can build fighters on ships
+134    WORD   -Colonies can build fighters on ships
+136    WORD   -Robots can build fighters on ships
+138    WORD    Odds of cloak failure (0..50%)
+140    WORD   -Privateer can rob cloaked ships (Rob Ship mission)
+142    WORD    Sensor range (ships visible)
+144    WORD    Dark Sense range
+146    WORD   -Lizard: Hissss mission
+148    WORD   -Rebel: Ground attack
+150    WORD   -Federation: Super Refit
+152    WORD   -Crystal: Web Mines
+154    WORD    Fuel used for cloaking in kt (1..50)
+156    WORD    Range of Sensor Sweep mission
+158    WORD   -New natives appear on planets
+160    WORD   -Planets attack ships
+162    WORD    Cyborg assimilation rate
+164    WORD    Web Mine decay rate
+166    WORD    Mine decay rate
+168    WORD    Maximum mine field radius
+170    WORD    Trans Uranium Mutation rate ("isotope TUDR")
+172    WORD    Structure decay
+174    WORD   -Overpopulation eat supplies
+176    WORD   -Ships without fuel can move
+178    WORD    Odds of running on a mine
+180    WORD    Odds of running on a Web mine
+182    WORD    Range from with mine fields can be seen
+184    WORD   -Mines destroy enemy mines
--- Host 3.11a and later: ---
+186    WORD   -Engine Shield Bonus
+188    WORD    Engine Shield Bonus Rate
+190    WORD    Colonies: mine sweep rate when sweeping with fighters
+192    WORD   -Colonies: can use fighters for web sweeping
+194    WORD    Mine Sweep Rate
+196    WORD    Web Mine Sweep Rate
+198    WORD    Lizard: Hissss Effect
+200    WORD    Privateer: odds of a Rob Ship failure
+202    WORD   -Rebel can be attacked by planets
+204    WORD   -Fascist can be attacked by planets
+206    WORD    Mine Sweep range
+208    WORD    Web Mine Sweep range
+210    WORD   -Terraforming missions ("science missions")
+212    WORD    Odds to run on a mine with a cloaked ship, in 1/10 %
+214    WORD    Damage level that prevents cloaking
+216    WORD   -Federation: Crew bonus ("Scotty Bonus")
+218 34 BYTEs   Information on small meteors
                 +0     WORD    Probability
                 +2     DWORD   Minimum Neutronium
                 +6     DWORD   Minimum Duranium
                +10     DWORD   Minimum Tritanium
                +14     DWORD   Minimum Molybdenum
                +18     DWORD   Maximum Neutronium
                +22     DWORD   Maximum Duranium
                +26     DWORD   Maximum Tritanium
                +30     DWORD   Maximum Molybdenum
+252 34 BYTEs   Information on large meteors, same as above
+286    WORD   -Send messages for meteor impacts
--- Host 3.12c and later: ---
+288    WORD   -One-Engine ships can tow
+290    WORD   -Hyperdrive ships
+292    WORD    Climate death rate
+294    WORD   -Gravity wells
+296    WORD   -Crystal: like hot planets
--- Host 3.13b and later: ---
+298    WORD   -Mines destroy web mines
+300    WORD   -Climate limits population
--- The Host 3.14 HConfig ends here ---
+302    DWORD   Maximum income per planet
+306    WORD    Maximum number of Ion storms (0..100)
+308    WORD   -Firecloud Chunnel
+310    WORD   -Super Spy Deluxe
+312    WORD   -Ion storms hide mine fields
+314    WORD   -Glory Device
+316    WORD   -Loki anti-cloak
+318    WORD   -Lady Royale gambling
+320    WORD   -Cloaked ships attack
+322    WORD   -Ship cloning
+324    WORD   -Crystal and Privateer: boarding (tow capture)
+326    WORD   -Imperial Assault
--- Host 3.2 beta 2a and later: ---
+328    WORD    Neutronium made by the Cobol ship per ly traveled
+330    WORD   -Aries ship can do alchemy
+332    WORD   -Bioscanner
+334    WORD    Hull tech level, from which onwards ships are not slowed down
                by mine hits (Hull tech mine slowdown)
--- Host 3.22.022 and later: ---
+336    WORD   -Loki de-cloaks Bird Men
--- Host 3.22.036 and later: ---
+338    WORD   -Allow VPA features (i.e. large cargo transfers)

New Hosts normally append their new settings after the end of the file. Note that Host itself will not upgrade the HConfig file, if the file has the wrong size, the default configuration is used. The HCONFIG.EXE program must be used to enlarge the file.

Some add-ons (most notably, the D&D ones) also read HCONFIG.HST, and cease to work if it does not exist.