Just a note as of December 2020 - "Conscript" difficulty has been replaced by "Easy" difficulty. There is now only "Easy, Standard, and Hard" difficulties. Just play through all 14 missions on Easy and it will pop at the end of the game. Should take about 16-18 hours I would guess for most people.
NOTE: Autosaves are not very frequent, so use manual saves from the pause menu as often as you feel comfortable doing.