Alright, this is a premise I once had for a tabletop game, here's a brief summary:

For reasons unknown, by means unknown, Giants of myth and legend have returned to the world. Many kinds, seemingly across all mythos, and others not known.

Nobody is sure why, but the gods and other figures that might challenge or otherwise control these Giants are notably absent.

There are different "classes" of Giants, and some have even organized themselves into loose "factions".

The Titans, including the real deals, would make war and seek to reclaim the Earth under their rule.

Wild Giants are more or less that: unorganized, with no real goals, just going about their daily lives. That might be alright, save for the fact the best of wild Giants are indifferent to any damage or harm they do, and they worst are just monsters.

Lastly, there's the Sentinels, Giants who would fight the Titans, and work/coordinate with human military forces to do so.

I'll work up an OOC, but only if I can get enough interest, say, 4 players?

Players can be Basic (human like) Giants, Monstrous (think trolls and ogres), maybe Elementals (not too many, as a matter of power balance, but the Jotunn, or Frost Giants are examples. Also, the Rock-Biter, from The Neverending Story). Godlike Giants (The Titans of myth, among other examples) are not ok for player characters, but they do exist in this setting. I'm willing to consider players allied with the Titans, but not many.

be sure to post questions if you have them!