GOG
1145335432 Castles: The Northern Campaign AR, AU, BR, CA, CN, FR, GB, ID, IN, JP, KR, NZ, PH, PL, TR, TW, USSteam
app/4352750 Castles: The Northern Campaign AR, AU, BR, CA, CN, FR, GB, ID, IN, JP, KR, NZ, PH, PL, TR, TW, USsub/1521236 Castles: The Northern Campaign AR, AU, BR, CA, CN, FR, GB, ID, IN, JP, KR, NZ, PH, PL, TR, TW, US