Tom Clancy's EndWar

For this trophy you need to complete the Prologue campaign on the hardest difficulty. Although the A.I is much more challenging on Hardcore, the missions are still more or less tutorials so you shouldn't have too much of a problem. The toughest mission for me was "Finishing Move". See the description for Impregnable for a decent strategy on how to beat it. The trophy will pop after you complete the last mission in the prologue, which is defending your Capital city. This stacks with Road to War so you'll get both for completing the Prologue on Hardcore but this is not recommended.