Obsession: Useful Box

No. The corrected Thomas MacMillian, Miss Eleanor Brassington, and Alexander Pinder cards replace their original versions, as do the corrected Housekeeper’s Room tiles. The corrected Miss Brassington grants 0 VP, and both sides of the corrected Housekeeper’s Room grant 1 VP (pp. 1–2).

No. The new West Terrace tiles may optionally replace the base-game West Terrace tiles. The new tile is not a monument (p. 3).

Add the Business Room tiles to Obsession; they are available when initially populating the Builders’ Market. Its tea-trade investment details are on the Unique Rules Reference card (p. 2).

The solo player drafts a servant when choosing their family board and uses the new pass rule that allows hiring servants on a pass turn. All other aspects of solo play remain as in the base game (p. 4).

Yes. The Dynamic AI card can be used for the base solo game with or without Upstairs, Downstairs servants; it preferentially scavenges valuable tiles, making the opponent more difficult (p. 4).