
Two jackhammer upgrades: these upgrades are really expansive, but the first one makes us dig faster in the Temple of the Destroyer, and the second one unlocks Slipstream Jet which saves massive time on Yarrow. SWD2 looks fantastic, like a cartoon with a distinctive visual style. She’ll also meet new friends and discover a foul conspiracy. A steam-powered robot looks for her friend, the protagonist of the first SteamWorld Dig. Jackhammer: technically, this item is not required, but it allows us to dig very fast Can you get to the final boss, Prisoner Dead Cells. One pressure bomb upgrade: every upgrade of the bomb increases its range by one tile, and we need one extra tile range for the second Yarrow barrier. Pressure Bomb: this is a mandatory item to open the two barriers of Yarrow. One water upgrade: without a third water bar, we would be short on water after the second Yarrow barrier, and we would have to dig 4 blocks with the pickaxe to access a Transport Tube and refill water.
Vidar Boots is not much useful, but we must unlock it anyway so we use it when needed. The fourth one unlocks Aramid Armor which is needed for the final boss.
Four armor upgrades: the third upgrade unlocks Vidar Boots, which makes us invulnerable to lava and acid for a short time. The second one would also save time but is more expensive. One pickaxe upgrade: it allows us to dig blocks in one hit at the top of Archaea. The second one saves time for the farming section at the bottom of the Temple of the Destroyer.
Two bag upgrades: the first one is really cheap and can be bought together with the lamp. Lamp: we must buy it to unlock upgrades and to enter Archaea from the town. Speed boots: you cannot advance the game without them. We are collecting a certain amount of items and upgrades, either because they are needed, or because they save time in the run: