Renegade Space Marine Chapter Creation Table

A creation table for Chapters that do not serve the Imperium, nor the Ruinous Powers, choosing to go rouge instead.

Chapter Origins

Who was the Chapter's Progenitor? (d100)
1-30	Ultramarines
31-45	Blood Angels
46–55	Dark Angels
56-60	Traitor Legion
61-68	Imperial Fists
69-78	Reroll, choose a successor from that chapter, or choose unknown
79-86	White Scars
87–94	Raven Guard
95-98	Iron Hands
99	Space Wolves
100	Salamanders

When Was The Chapter Founded? (d100)
1	31st Millennium (the Chapter claims to be a Second Founding) (If rolled Traitor Legion, this must be taken by default.)
2–5	32nd Millennium
6–10	33rd Millennium
11–20	34th Millennium
21–30	35th Millennium
31–40	36th Millennium (Cursed Founding)
41–50	37th Millennium
51–60	38th Millenium
61–70	39th Millenium
71–80	40th Millenium
81–95	41st Millenium (Twenty-Sixth and last known Founding)
96–100	Unknown

Imperial Exodus (d100) Causes
1-6	Altruistic Downfall: They came to blows with the Imperial Inquisition for actions undermining their authority to aid other fellow Imperials, resulting in the excommunication of the chapter.
7-13	Imperial Destruction: This chapter often caused more Marines Malevolent than the Imperium felt comfortable with, so they were branded traitors and excommunicated.
14-20	Eternally Loyal: Secret commands from high-ranking Imperial Lords demanded this chapter's secession from the Imperium, whether for unspecified reasons or for a particular mission.
21-27	Chaos Use: They somehow came to discover the power of Chaos tainted weapons, and began using such artifacts. It was not long before they were driven out.
28-34	Hereteks: Chapter began to dabble in technologies beyond them, and found themselves enemies with the Mechanicum, who forced them out of the Imperium.
35-41	Xenophilia: The Chapter was friendly with a group of Xenos and collaborated with them a bit too frequently. When the Ordo Xenos found out, they had the Chapter excommunicated.
42-48	Bitter Resentment: The chapter(s) were plagued by mutations, and became fed up with the treatment of their Chapter(s) by other forces of the Imperium, and chose to strike off on their owned.
49-55	Political Suicide: Several bad political decisions and affiliations made this chapter a victim of their own ineptitude, being declared traitors and forced to flee from their former allies.
56-62	Codex Diversitas: The Codex Astartes is a Marine's life-line, and this chapter diverged too greatly from it's rules and regulations, causing their ultimate expulsion from the Imperium of Man.
63-69	Emperor's Light: These Marines saw the Imperium as a perversion of the Emperor's will, deemed its festering bureaucracy beyond redemption, and rebelled in order to try and stay true to the Emperor.
70-76	Cowardice in the Face of Extinction: Near the brink of annihilation, the Marines took an extremely cowardly or horrible action to preserve their Chapter, and were excommunicated for this.
77-83	Destiny: The seeds of their leaving the Imperium were implanted long ago, be it by their founders, another institution, or some other force this was always going to happen...
84-92	Cult of Personality: A single Champion within the Chapter(s) whose philosophy and ideals have lead the marines down their own path.
93-100	Lust for Adventure: These Marines saw a life free from the Imperium and their restrictions enticing, and left seeking high adventure at whatever the cost!

Properties and Defects

Geneseed Mutation Severity (d20) ( For Bitter Resentment, roll a 1d2 for either Significant or Heavy Mutation)
1-10	Pure Geneseed
11-14	Minor Flaw: Geneseed takes a new form from its predecessor's.
15-19	Significant Mutation: Roll once on the Geneseed Mutation table.
20	Heavy Mutation: Roll twice on the Geneseed Mutation tables.

If they have one, what mutation do they have? (This doesn't include mutations passed down from their founders, like the Imperial Fists' lack of a Betcher's Gland and Sus-an Membrane.)
1	Hyper-stimulated Omophagea - Eat the enemy!
2	Oversensitive Occulobe - "I'm in the dark and I can see perfectly! How usefuAAAAH THE SUN'S COMING UP HOLY EMPEROR MY EYES"
3	Mutated Catalepsean Node - Yeah, just go here. It's basically the same effect.
4	Oolitic Secretions - Weird-coloured skin. Yeah, that's it.
5	Disturbing Voice - Ranges from speaking like a creaking floorboard to having a deep, booming voice.
6-8	Lost zygote - If you don't understand this one, why are you even trying to make a Chapter?
9	Doomed - the Chapter has either lost the ability to generate Progenoids or the Black Carapace, stopping future neophytes from being created. Unless they fix this fast, they're fucked.
10	Multiple instabilities - roll d3 more times on the table, rerolling multiples of the same result.

If one exists, what is the Chapter's Flaw? (d10)
1–2	We Stand Alone - The Chapter is either distrusted for some reason, or shuns contact with others.
3–4	Pride in the Colours - The Chapter hates doing anything that covers their livery, despite their wayward ways.
5–6	Faith in Suspicion - The Chapter particularly hates a single Imperial institution, and refuses to work with them.
7–8	Eye to Eye - The Chapter hates any method of warfare other than running up to the enemy and punching them.
9-10	Chapter Cult - The practices of the Chapter are wierd and probably quite unsavory.

Lastly, add a name, colours, and heraldry. God-Emperor help us all.