Twilight Imperium

Rules

https://www.fantasyflightgames.com/en/products/twilight-imperium-fourth-edition/

Learn to play

Rules references and FAQ

Prophecy of Kings Rulebook

 Prophecy of Kings rules references

Thunder's Edge Rulebook

Learn to play videos

Learn to play Twilight Imperium 4th Edition in 32 minutes

How to play Twilight Imperium Prophecy of Kings in 7 minutes

How to play Twilight Imperium Thunder's Edge in 21 minutes

Other

Twilight Imperium Wiki (information about the different playable factions)

Twilight Imperium Basic's Power Point Presentation

House Rules

Support for the Throne promissory notes can never be used to score the 10th point

Support for the Throne promissory notes cannot be used in the game's last turn