Race for the Galaxy: Alien Artifacts

No. You can add the new start worlds and game cards to the base game without using orb cards, artifact tokens, the priority slide, disks, or survey teams; ignore powers and victory conditions that refer to them (p. 2).

Any player choosing an Explore action triggers one orb step, including Explore: +1, +1 or Explore: +5. The orb step happens before the normal Explore phase (p. 4).

No. To pass a beam barrier, your current Military—including specialized Military vs. Aliens—must meet or exceed its strength; Pay-for-Military powers cannot be used for this (p. 5).

No. A survey team must end its move when it enters a space with an artifact token and pick it up. If the token is on a breeding tube space, you must immediately draw and play an orb card, which cannot overlap any part of the card your team occupies (pp. 5, 7).

No. You may examine a token when you pick it up, but keep it face down until you choose to use its power; each power can be used only once for a given team move or action. At end-game scoring, reveal unused tokens and score all collected artifacts (p. 7).