Delete save files for 100%

(This guide only works for PC) 
To delete save files, make sure the game isn't connected to Steam Cloud. 
To disable this feature go to your steam library, right click the game, select properties, open the update tap, uncheck Steam Cloud.
To find the actual save files you have to go to C-drive -> Programs (x86) -> Steam -> userdata -> 82800351 -> 217080 -> remote
It should have a file called dwtec.sav
Delete it.

WarDrums_

Doctor Who: The Eternity Clock