Simple replace the whole content of the below file with content below and start the game. It will give you a instand 100% Game in Steam. EZ!

%UserProfile%\Documents\my games\democracy3\achievements.ini

[achievements]
socialistparadise
technologicalsuperiority
crimefreeutopia
onepartystate
egalitarianmiracle
povertyeradicated
soverreignwealth
elderstatesman
worldhealth
cabinetgovernment
electoralsuccess
landslide
legitimateruler
divisiveruler
darwin
intelligentsia
budgetbalancer
flipflops
surveillance
popularleader
worldstage
filibustering
fullemployment
kyotoaward
survivor
freemarketparadise
policestate
godskingdom
greenutopia
economicmiracle
fillibustering
educationalfailure
oildependency
agrariansociety
dividedsociety
inebriatedsociety
truepatriot
economicstability
apatheticelectorate
bananarepublic
narcoticeconomy
militarystate
lonelyatthetop