For reference, these links may be of interest:
Official Penumbra Webpage - atlas-games.com/penumbra/index.php
Official Coriolis Webpage - atlas-games.com/coriolis/index.php
Penumbra & Coriolis Errata - atlas-games.com/penumbra/penerrata.php
Official Northern Crown Webpage - atlas-games.com/crown/index.php
Northern Crown Errata - atlas-games.com/crown/NCerrata.php
Official Nyambe Webpage - atlas-games.com/nyambe/index.php
Nyambe Errata - atlas-games.com/nyambe/nyambefaq.php