Talk:Heavy Platform/@comment-26493392-20150709183724/@comment-24221205-20150710011438

You can build two in addition to the 18 regular platforms holding regular turrets. From the Buildings button, next to the Platoons button, select Defense and then Heavy Platform and place it in your base. You will need 60,000,000 each in metal and oil. Build time without paying 73 gold for instant build is 1 day 5 hours.