The Forgotten Spartans

[Thin Crust]

This is probably the biggest machinima out there besides RedvsBlue. It's only 8 episodes long right now, but still ongoing. It starts out as an entirely average series, but after episode 3, it gets really epic with episodes going 20 minutes in length. I don't want to spoil the story, but here's a trailer for episode 7.

And if you feel like watching the whole thing, episode 1 is here.