Okay, I sat down and started working on it, so this is for all you D20 Modern players who remember the original
Gamma World module...and also for those who don't. The big gold robot on the cover is a Centurion, controlled by the insane computer that calls itself REAPER.
So far I've rebuilt the gold Centurions using the robotics rules in
D20 Future, and it worked just grand. I assumed PL 7 (seems about right for Gamma World's "ancients"). I tried to pick the same weapons wherever possible. I did substitute PL 7 stun grenades for the inferior gas grenades, but kept the fiery explosive and fragmentation grenades. (It's amazing...even after nearly 30 years, the concept that a fragmentation grenade does 3d6 damage remains hardwired into the d20 system. Kinda cool.)
The only other change I made was to increase the robots' size. I mean, if you apply any perspective at all to the front cover, it looks like that robot is 10-12 feet tall! Yet Mr. Gygax claims on p. 27 of GW1 Legion of Gold that they stand a mere "two meters" in height. I made them as large as they've always been in my imagination...and damned if the hit dice and hit points didn't work out just right.
A fun translation. Enjoy. Next I'll be converting the Legionnaires...humans that have been cybernetically enslaved by REAPER.
THE LEGION OF GOLD
Centurion Robot (Biomorph): PL 7, CR 5; Large biomorph (10 feet tall); HD 4d10+20; hp 42; Mas —; Init +1; Spd 25 ft. (Legs, 2); Defense 17, touch 10, flat-footed 17 (+7 Neovulcanium armor); BAB +3; Grap +13; Atk +9 melee (1d8+6, slam); Full Atk +9 melee (1d8+6, slam) or +3 ranged (mounted mini grenade launcher, laser pistol); FS 10 ft. by 10 ft.; Reach 10 ft.; SQ DR 5/energy, Darkvision 120’, construct; AL –; SV Fort +1, Ref +1, Will +1; AP 0; Rep +0; Str 22, Dex 10, Con –, Int –, Wis 10, Cha 1.
Locomotion: 2 legs;
Manipulators: 2 arms w/ advanced hands
Armor: Gold neovulcanium, Bonus +7, Speed -5 feet
Sensors: Class VII (high definition video/audio, chemical vapor scanner, pressure sensors, multiband radar, +2 initiative bonus)
Skill Software (Net): (8 ranks) Climb +6, Jump +6, Listen +4, Search +4, Sense Motive +2, Speak Language (English), Spot +4.
Feat Software (Net): (4) Personal Firearms Proficiency, Armor Proficiency (Light, Medium, Heavy).
Ability upgrade: Dex +2
Accessories: AV recorder/transmitter, Internal storage unit (40 lb.), loading mechanisms, Robolink (Control Computer – REAPER), Vocalizer, Inertial inhibitor (magnetic field, DR 5/energy ).
Weapon Mounts: Mini grenade launcher (Dmg varies, Crit 20, Range 70, Rate 1), grenades: Fireflush (10’ burst, 3d6 dmg, Reflex DC 15), Fragmentation (10’ burst, 3d6 dmg, Reflex DC 15), Stun (15’ burst, Reflex DC 18, stunned 1d4 rnds); Laser pistol (Dmg 2d8, Crit 20, Range 40, Rate 1).