White shields they carry in their hands,
With emblems of pale silver;
With glittering blue swords,
With mighty stout horns.
In well-devised battle array,
Ahead of their fair chieftain
They march amid blue spears,
Pale-visaged, curly-headed bands.
This is a Dungeons and Dragons game set in an Iron-Age Celtic world, where the Fey and Humanity clash over land and where the Fomorians seek to destroy everything in their path. Where life is cheap but family is everything. Where legends aren't born, they're forged by adversity and a little luck.
The game is fairly 'human-centric', with Elves and Half-Elves finding the human world very unforgiving and harsh (and where their ears might be worth more to some than they are). Half-orcs are renamed 'half-Fomorians' and they are viewed with suspicion and shame - they often aren't made willingly in man's conflict with the Fomorian races.
As a DM, I run an asymmetrical game - the baddies and the goodies aren't finely balanced. Instead, I buff Big Bads with 'villainous actions' and eyeball monster rather than trust the CR system implicitly. I curate the player experience instead of just doing what the DMG tells me to do in the hope that I can make the game more fun for my players.