https://www.pcgamer.com/anthems-freeplay-mode-looks-very-familiar/

Between Anthem’s missions, players will get to fly around the world, exploring it on their own or with pals while completing jobs. It all looks like familiar stuff, from collecting stuff for lazy NPCs back home to participating in world events for the chance to net a big reward. IGN posted some footage of the freeplay mode, and you can check it out below. 

One moment did stick out as something that wasn’t just a repeat of what we’ve done in Destiny or Warframe. After the completion of a world event, a secret door opened, leading players to a hidden boss encounter with a very large, very angry foe. After launch, I expect those surprises will quickly dwindle, but I'm a big fan of events that go a step beyond just ending with a shower of rewards.