Operation Babel: New Tokyo Legacy

To earn this, you need to spend at least 100,000 GP at the Development Lab, which is cumulative. Buying items, crafting, and boosting items cost money and count towards this trophy. The easiest way to do this is by buying the Squek Hamr (must progress far enough in the story to buy) which costs 150,000 GP. You can save and reload after buying this item so that you don't waste your GP.