Lots of guns laying around
You get briefed by some woman... Characters aren't Just Cause's strong point.
GTA like racing with speedboats
Some missions take place on ships
Sometimes you just shoot while others do the driving
Houses are not much use but at least you get a helicopter
Armored transport can take lot of punishment
You can fly incredibly high
Villages and villas are captured by destroying enemy blockades
Loading screens give you hints
PDA - basically the equivalent of the Escape button and Map button all-in-one
PDA - political map: provides information controlling political factions in the land.