@Pika IIRC, the first game had devices you could build that would harvest resources for you. In the second game, you harvest them yourself using the vacuum. If you weren’t keeping track of where the resource nodes were located while exploring, you’ll find yourself having a hard time getting them when you start needing them for the end game stuff. End game drones can harvest resources automatically but they’re slow. In hindsight it wouldn’t be so bad if I focused more on resources from the start.