Basically just some random gameplay thingies you can use if you want. Don't know if it was worth it to make a guide about this but maybe you'll find something interesting.

About
This new addition is probably the most interesting one to most people, myself included, 'cause i want to see funny ragdoll stuff and all, so that's why i'm putting it at the top. It's a super easy to execute little trick, that can either make you even more OP than you already were, or it can just make the game a little more entertaining.

Execution

1. Go to a monastery
   
2. Activate the priest (or whatever your choice of words for that action is)
   
3. During the first cutscene, where Rico enters these holy halls, fast travel to any location you like
   
4. Now you got yourself an invincible dictator removal specialist

Please Note

• Doing the full monastery visit will deactivate this fun stuff
  
• Fast travel doesn't affect this glitch (which is really cool)

About
This one uses the overlap between the eDEN Airpace and Insula Fonte region to make the Black Hand appear in Feno or Lavanda. Can make for some pretty cool scenarios, especially when you're in a liberated town or outpost and they just come along and kill everybody. (does sound a little sad but it's also fun)

Execution

1. Start your flight at the airship
   
2. Decide which province you want to go to
   
3. Fly there and try to reach land as soon as possible for best results. This artwork shows you optimal entrance routes
   
4. You were successful when you've reached the desired province and its name does not appear in the upper left corner of the HUD (actually it shows up at first but then disappears once you've moved a little further into the province)

Please Note

• If you leave the province, die or fast travel, the effect will go away and Black Hand will no longer spawn
  
• When reinforcements are called, only Black Hand helicopters will show up to deal with you
  
• If you also own the Mech Land Assault DLC, Mechs will show up as well, however, when you get heat, they usually disappear when you move a short distance away and don't look at them
  
• You get heat as soon as a Mech, that isn't otherwise occupied (with killing rebels for example), spots you

About
A way to have the camera zoomed in without targeting anything with a gun. This allows you to take a closer look at an object. It can also be used as a first person-ish perspective. There are multiple ways of achieving this.

Execution

• Method 1: While Rico is in the car exiting animation, press MMB at just the right time. You can kinda spam the button if you want but not too often because you might exit the zoomed-in camera again and be required to repeat the process
  
• Method 2: Grapple to the ground in front of you and while Rico is standing up press MMB
  
• Method 3: You can also press MMB while Rico is deploying his parachute, after jumping of a cliff or reeling in. Also possible while reeling in, and letting go midway (in combination with MMB, obviously) while in parachute mode
  
• Method 4: Not actually another method but I wanted to say that there are very likely more ways of doing this but these are the ones I usually use

Please Note

• You can only walk
  
• You can jump
  
• You cannot grapple without leaving this camera
  
• You can easily leave this view by pressing MMB again

Here's me using this camera angle to take a photo of a car

About
Alright, this one's pretty easy for any player to discover but I'm putting it here anyway just because of how often I already used it, usually in combination with a sanctuary to get infinite nights as the standard ones are just way too short. It's very unreliable but still a cool thing to know about.

Execution

1. Fast travel from anywhere to somewhere. It's usually more successful when you travel long distances
   
2. Check if the time is stuck by looking at a sharp shadow or the stars
   
3. If it worked then hooray, if not then try again or give up. That depends on what you want to do with your day

Please Note

• If you die, the time gets unfrozen
  
• If you fast travel, the time will also proceed to act normal again

I will update this guide if I find more things that are worth sharing but that's it for now.
Also if you've found places where this guide is inaccurate, wrong or just bad, please write a comment and I'll take care of the problem as best as I can.