The Saboteur

The area referred to as the Countryside is basically everywhere else once you take away Paris 1, 2, 3 Le Havre and Saarbrucken. There are slightly more than 425 ambient freeplay events available so if you are having trouble with one in particular, just leave it and move on. When the trophy pops, there will be a handful of events left over in the area. Be aware though that there can be a slight overlap in areas so don't panic if it does not pop when you think it should, just keep at it and the trophy will pop.
 
If you are not sure of the area referred to as Countryside, then see this map:
 

 

 
There are 1330+ ambient freeplay events spread across the whole game map. You will have to complete 99% of these to get all of the freeplay based trophies. Although this can seem pretty daunting, it is not as bad as it seems.
 
It will take roughly twice as long to get the freeplay trophies as it will to complete the story missions. You can either leave the bulk of them till after the story, or chip away at them in between missions. Here are a few tips that helped me get through them quickly:
- Do the main story first (the GOLD icons). Leave the grey ones till later, if you like
- Unlock all the weapons first. You will need a good selection to choose from.
- Unlock all the perks first. This makes it SO much easier and quicker. A must!
- Buy all the maps from the weapons dealers. Obvious really, you have to know where to look.
- Always carry a silenced weapon and a launcher: Viper and Panzershrek worked best for me.
- Make sure you have the Super RDX and Bridge Charges.
- Buy the Weapon Seller car upgrade, so you can restock on the move.
- Buy all the available upgrades: magazine size, damage, etc.
- Make sure you have the ability to lay explosives while disguised without suspicion.
 
Once you have all the above, you are ready to start. Set one of the racers as your getaway car. I choose the Aurora as I had the guns and boost if needed. Next fill up on ammo. You should try to keep yourself stocked up, particularly with RDX. Also, as said above, you should have a silenced weapon and launcher in your load out at all times. The Viper MG and Panzershrek easily make up the best combo, with the best magazine capacity, accuracy and damage stats.
 
From here there are two ways to proceed: either run around like a headless chicken blowing up everything you see, and being continuously hounded by rabid Nazis, or play it smart and do the most damage you can without detection. I strongly recommend the latter.
 
Whenever you can, get a disguise. Couple this with the ability to lay explosives while disguised without suspicion and you can do some serious damage very quickly. Since targets tend to occur in clusters, use this to your advantage. You should be able to rig everything to explode before being discovered. Then simply move away and detonate. If you have left the suspicion zone, shown by yellow circles on the map, you should be golden.
 
Whole bases can be wiped out in this way. Do remember that the RDX transmitter has a limited distance though. You may have to run around the base to set them all off.
 
Sometimes there will be no obvious target. This generally means you have a postcard, viewpoint or jump nearby. You should be able to figure out which it is easily enough. If you find that it is none of these, move away form the area and then return. Generals can sometimes disappear from view for some reason. He will reload when you re-enter the area.
 
Make use of the ! indicator under the map. For example: When killing Generals, attack from behind with a silenced weapon. If you are not seen while shooting and then holster the weapon straight away, you will get away without setting off an alarm. Even the general's two bodyguards will look straight at you without figuring it out.
 
Another use of the ! indicator is running while in disguise. If you can sprint while in uniform without raising an alarm, you can pretty much do anything without getting found out. This can come in handy when you do not feel like climbing up to a tower or propaganda speaker. If you can sprint without raising suspicion, feel free to use the Panzershrek to wipe out the target from street level. A great time saver.
 
Another great time saver are the AA gun positions, do not blow these up straight away. Take out the two guards, and enter the turret. More often than not, you will be able to take out 3 or 4 other targets with that gun. Afterwards, set a timed charge, and go and lose your wanted level.
 
You should try to be systematic. By sweeping across each area without leaving to many lone spots spread across the map, you can keep your distance covered to a minimum. Saves time and effort in the long run.
 
Lastly, use the secondary story missions as save points while working through the freeplay events. I was wary of trusting the autosave to remember that I had just spent the last three hours grinding through targets so I would finish each session with one of the GREY icon secondary missions. At the end of the mission, the game would do a proper autosave and ensure all progress was saved.