Adamantine Armor for Starfinder 1e (Patreon)

Starfinder First Edition specifically assumes that special materials like adamantine are already used in armor construction to the greatest degree possible in each suit, so there's no need for special adamantine rules such as exist in the feudal fantasy version of the game.

It's a good claim. I was part of the design team that decided that was the way to go.

But it's not... fun. At least, it's not ONE kind of fun. Some people adore having options, including fantasy terms having game mechanical effects in science-fantasy games. And, I admit, I am one of those people.

Now, this is not the route for all games nor is having rules for everything the only way to create this effect. But for people who DO enjoy a big bag of Salty Rules Crunch...

Armor made of special materials can only be made of ONE special material. You can't have your armor benefit from being made of both adamantine and mithral, though legends claim there was once a special material that acted as both, called dragonsteel...

Links to all my Starfinder special materials for armor articles (which is TWO, at time of writing) can be found, along with links to many other Starfinder entries, at the Paying-Patreon Exclusive Starfinder First Edition Index.

Special Armor Material: Adamantine

Adamantine armor replaces most of the materials normally used in the armor's construction with the ultra-hard, ductile metal known as adamantine.

Price is increased by +75%

Hardness and hp of the armor itself are increased by +50%. Crafting it requires appropriate skill ranks equal to the armor's item level +3.

Because adamantine armor must maximize its coverage to benefit from the toughness of the metal, it loses two upgrade slots. Armor with 0 or 1 upgrade slots cannot effectively be built as adamantine armor.

When the wearer of adamantine armor takes damage, the damage is reduced. The reduction is equal to 1/4 the armor's level for light armor and shields, and equal to 1/2 the armor's level for heavy armor. This reduction happens after any other adjustment to the damage (such as energy resistance, damage reduction, vulnerability, temporary hit points, and so on). The reduction in damage from adamantine armor and an adamantine shield stack.

(The deep black of adamantine armor is a sign of a tough foe. Art by grandeduc.)

Okay, that's mithral and adamantine, the Big 2 of special materials for d20 games. Do people want to see me do MORE Starfinder armor special materials?