I was really impressed by this. Just the right balance between crunch and simplicity. And it made me want to stat out a base right away LOL 

FORTS is a basebuilding supplement for FIST.

The PDF is 4 pages, densely organized, but very clean and readable.

Contents-wise, think of this like the group playbook from Blades In The Dark. You choose a base type, you invest coin in upgrades, and you get resources and allies and other support out of growing your base.

There's a lot of granularity and detail here, and anyone who's a fan of the last mainline Metal Gear will find something in the mix that they love. There's recruitment, resource management, an expertise system. It's comprehensive without being overwhelming.

Overall, this is a fantastic addition to a FIST campaign. If you want to show the PCs growing and changing not just as characters but as a geopolitical force, I strongly recommend plugging this into your game.

Tight and to the point. Base-building or business supplements can sometimes be huge cumbersome pieces of shit that are hard to grasp and make you go, "Why even use this?" This avoids that problem.