Talk:Tutorial: How to Play/@comment-112.215.36.142-20150215101224/@comment-25730832-20150215101741

"To do construction/development, you will need  development  materials, which have an icon that looks like "two nails side by side and a gear". You can get them by completing some quests and expeditions."

Check here for: Expedition & Quests

Quicknote:

It's not that grindable, best way to get it is by dailiy quests. Yes, it's the type of stopper in the game.