Fort

You may use the public action, the private action, or both in either order, but you must finish one action before starting the other, and you must use at least one action on the played card fully (including any suits you add). (pages 6–7)

No — when you add a card to improve a played card, at least one of its suits must change the effect of at least one action you use; you cannot add cards that serve no purpose. (page 8)

Yes — you may follow by discarding a multi‑suit card as long as at least one suit matches the leader's played card, and if it has two matching suits you count both for actions that use an × suit. (page 9)

Yes — during Phase 3 you must recruit one card into your discard pile, either by taking any card from the Park (then replacing it), taking any card from a rival's Yard (no replacement), or drawing from the Park deck. (page 9)

The Advance Fort action lets you pay the resources shown between your current and next Level from your Stuff and/or Pack, then move your Fort marker up; each Level increases Lookout and Pack capacity and grants rewards at Level 1 (a made‑up rule), Level 2 (a perk), and Level 5 (the macaroni sculpture and an end‑game trigger). (pages 12, 10)

✖ (PER) means repeat the left action the number of times shown by the symbol on the right; ▶ (THEN) means do the left action, then do the right action (you must do the right if able); parentheses group actions so the whole group is multiplied by an ✖. (page 14)