Iron Will mode is an alternative to regular game play based around having NO kittens. It is enabled when a Library is built before a Hut. Once you have built a Library, an additional tab (IW) is added to the Bonfire which removes living spaces from the list of buildings to prevent you from accidentally adding one. (The mobile app version does not add the Iron Will tab.)
Any building that increases the maximum kitten population takes you out of Iron Will mode
Burning Paragon while in Iron Will will end Iron Will mode.
These have no effect and can be ignored
|Iron Will||You truly deserved this||Build a mine without ever buying housing|
|Uberkatzchen||What does not kill you makes you stronger||Build a warehouse without ever buying housing|
|One Hundred Years of Solitude||How far is too far?||Build a steamworks without ever buying housing|
|Virgin Soil Upturned||Build 45 pastures without ever buying housing||Build 45 pastures without ever buying housing|
|Atlas Unmeowed||Construct a magneto in the iron will mode||Build a magneto without ever buying housing|
|Meow Meow Revolution||Construct a factory in the iron will mode||Build a factory without ever buying housing|
|Space Oddity||Complete a Moon Program in Iron Will mode||Research Moon Mission without ever buying housing in current game (Regular Version)|
|Space Oddity (Star)||Get Moon Program in IW without any paragon points||Research Moon Mission without ever buying housing in current game with less than 10 paragon (Insane Version, has Star)|
|Heart Of Darkness||Become a chieftain of a zebra tribe. (How is this even possible?)||Have more than one zebra|
Metaphysics and burned paragon will not prevent the starred Space Oddity achievement.