(Taken Almost Directly from the Unearthed Arcana)

Orcs are, on average, tall and broad. They have gray skin, ears that are small and slightly pointed, and prominent lower canines that resemble small tusks. Young orcs are often told about their ancestors’ ancient conflicts with elves in forests, dwarves under mountains, and invaders from evil planes of existence. Inspired by those tales, young orcs often wonder when the Immortal Karaash will call on them to match the heroic deeds of their ancestors, and if they will prove worthy of the Immortal’s grace.

Orcs of Mystara:

• Orcus Porcus: Definitely most common, with obvious porcine features. Pink, brown, black, or grey-greenish skin, sometimes with spots. Any color and length of hair arranged in any style imaginable. Tribal members identifiable by their smell. Wear anything shabby and filthy.
• Orcus Hyborianus: A Northern reaches’ breed with sickly white or light grey skin. Wear various furs. Can be found in some glaciers in high mountains.
• Orcus Imperator Rex: Porcine features less obvious allowing them to pass for really ugly humans. Prefer black or dark grey hooded cloaks. Copper skin, smaller snout. Psychotics and megalomaniacs believing other orcs to be inferiors. Some found in Orcus Rex territory (Broken Lands).

• Orcus Rubeus Vulgaris: Very short hair if any, brick-red to reddish brown. Simian features emulating many of the various monkey faces found in nature. Usually wear mismatched armor pieces, preferring chain mail and great helms. Southern Red Orcland natives (Broken Lands).
• Orcus Simius Terribilis: Long, shaggy hair, bright orange to dull red. Much more muscular and aggressive that the Vulgaris. Favor black, studded leather armor and hoods. Natives of northern Red Orcland (Broken Lands).

• Orcus Facies Ratis: Very short hair, ranging from tan to dull light brown. Longer, pointed snout. Favor black garb with hooded cloak. Nomads of the hills and mountains north of Alfheim.
• Orcus Canis Oriensis: Long hair forming a plume on the head, dusty yellow to brown. Pekingese face. Favor mismatched pieces of oriental armor and frightening helms. Nomads of the vast Ethengarian steppes, and Yellow Orkia (Broken Lands).

These orcs have a yellow-brown skin tone and very heavy brow ridges, which make them look cunning and suspicious.
Krugel Orcs wear light tunics, long trousers, knee-high boots of hard leather, and a garment called a tabarko. This garment is a circle of cloth some 6′ in diameter, with a hole in the middle; the wearer slips the tabarko over his head, his head through the hole, and lets the tabarko cloth hang down in front and back. This garment, usually white or bright yellow to reflect the sunlight, allows the orc’s skin to breathe but allow allows him to conceal a lot of personal weaponry. The tabarko is worn over armor when armor is worn.
The Krugel Orcs also wear a broad-brimmed hat against the sun, a sword-belt, and spurs. Their saddles come equipped with a lance-rest and quivers for bow and arrows.

5E Orc Traits

Creature Type: Humanoid (Goblinoid)
Size: Medium (about 6–7 feet tall)
Speed: 30 feet
Life Span: 80 years on average
As an Orc, you have these special traits.

Adrenaline Rush. You can take the Dash Action as a Bonus Action. When you do so, you gain a number of Temporary Hit Points equal to your Proficiency Bonus. You can use this trait a number of times equal to your Proficiency Bonus, and you regain all expended uses when you finish a Long Rest.
Darkvision. You have Darkvision with a range of 60 feet.
Powerful Build. You count as one Size larger when determining your carrying capacity and the weight you can push, drag, or lift.
Relentless Endurance. When you are reduced to 0 Hit Points but not killed outright, you can drop to 1 Hit Point instead. Once you use this trait, you can’t do so again until you finish a Long Rest.

BECMI Rules

Ability Score Adjustment: Orcs have a bonus of +1 to their Strength, but a -1 to their Dexterity
Natural Armor Class: Orcs start with s natural AC of 8
Spellcasters: Yes, Orcs can be Shamans up to 6th level and Wokani up to 4th level.

Title	Level	XP	HD	THAC0	Save: DR/P	Save: M W	Save: P/TTS	Save: BA	Save: R/S/S
Tribesman	0	0	1d8	19	12	13	14	15	16
Scout	1	1,000	2d8	18	12	13	14	15	16
Marauder	2	2,000	3d8	17	12	13	14	15	16
Raider	3	4,000	–	17	12	13	14	15	16
Plunderer	4	8,000	4d8	16	10	11	12	13	14
Ravager	5	16,000	5d8	15	10	11	12	13	14
Destructor	6	32,000	6d8	14	10	11	12	13	14
Devestator	7	64,000	–	14	10	11	12	13	14
Conqueror	8	130,000	7d8	12	8	9	10	11	12
Conqueror	9	260,000*	+2hp**	11***	8****	9****	10****	11****	12****

---