This article lists everything to do in Just Cause (1).
What is 100% completion?[]
This game does not count the completion % and therefore this is all unofficial. However, the Xbox 360 version of the game does have Achievements, which can be counted as the official 100%.
100% completion list[]

Achievement icon.
- Complete all storyline missions.
- Complete at least 50 sidemissions.
- Liberate all provinces of San Esperito.
- Help the Rioja Cartel take over all 45 cartel villas in San Esperito.
- Kill 500 enemies.
- Survive at least 5 minutes at heat level 5.
- Complete 20 land vehicle stunts. It's unclear what the game counts as this.
- Complete 20 sea vehicle stunts.
- Complete 20 air vehicle stunts.
- Complete 20 car-to-car stunts. This refers to jumping from the stunt position of one vehicle to that of another.
- BASE jump from 1 km altitude.
- Collect all collectable Items in San Esperito.
- Complete all 9 races.
200% completion list[]
This is a list of everything else that can be done. It's completely unofficial and meant as a voluntary challenge. Some of these are overlapping. Feel free to add more things to the list, if you can think of anything relevant.
General:
- Complete all sidemissions. These are tens of these, they're available in a random order and some of them are exclusive to specific places.
- Save the game at every safehouse.
- Reach the highest rank in the Guerrilla army.
- Reach the highest rank in the Rioja Cartel.
- Destroy all Communications Masts.
- Destroy all fuel stations.
Vehicles:

Crop spraying AVIA. A very rare vehicle.
- Drive every vehicle at least once.
- Drive every vehicle version at least once. (Faction colors and symbols.)
- Find and drive every rare vehicle. Some of these are mission exclusive and can't be saved at garages.
- Save a vehicle at every safehouse garage. Note that the boat garages don't save anything. The car garages possibly can't all be used at the same time, because older video games use a limited amount of shared memory for garages.
- Land a plane at every marked airport/airfield.
- Land the Alexander AX-14 somewhere other than the Mendoza International Airport and take off again with out damaging the vehicle.
- Let Rico be taken for a ride by an a.i. driver inside a land vehicle. There's a trick to entering a vehicle with out hijacking it.
- Make use of a passenger seat on an unoccupied vehicle. Very few vehicles let the player do that.
- Call every vehicle from the heavy drop.
- Get extracted at least once.
Improvised stunts and how to do them:
- Complete at least 1 "roof to roof stunt". These are counted by the PDA and it refers to jumping from the stunt position of one vehicle to that of another.
- Complete at least 1 "air to roof stunt". These are counted by the PDA and it refers to jumping to the stunt position of a vehicle whilst the parachute is open.
- Land a helicopter on the hand of the giant statue of Salvador Mendoza, get out and then take off again with out damaging the vehicle.
- Hijack a plane mid-flight (starting from another aircraft).
- Hijack a helicopter mid-flight (starting from another aircraft).
- Hijack a sea vehicle by landing the parachute on it.
- Have Rico be in the stunt position when the camera goes into cinematic mode. The camera goes into cinematic mode for a few seconds when a vehicle performs a stunt jump (or drives off a cliff).
- BASE jump off all the San Esperito towers.
- Complete BASE jumping ("BASE" refers to buildings, antennae, spans (bridges) and earth (cliffs).)
Weapons:
- Use every weapon at least once, or until out of ammunition.
- Make use of all vehicle mounted weapons at least once.
- Use a Mounted Gun from every type of stationary mounting point. (Guard towers, cartel villas, Buccaneer, ...)
Exploration:
- Find and interact with all easter eggs.
- Find and explore every type of industrial buildings (pump jacks, offshore rigs, factories, windmills, wind turbines).
- Find the dog that you can hear barking at any village.
- Visit every estrella MOTEL.
- Use the elevator at all San Esperito towers.
- Find and explore all unique and notable buildings (all buildings at Isla Dominio, cable cars, hidden temple at Isla Maria Dolorosa, mission locations, ...).
- Find at least 1 of every type of unmarked settlement: Military base, small village, cartel villa, town under construction.