This Seeking Tech guide will show you how to get the Believe It or Not trophy and achievement in Metal Gear Solid Delta: Snake Eater.
This will unlock when you “catch a tsuchinoko.”
To do so, follow the video and text guides below:
Play through the name normally. Along the way, make sure you look out for any small shacks and rooms. These usually contain ammo, food items, and, most importantly, mouse traps.
Once you meet Granin, you need to backtrack to the Ponizovje Warehouse and then exit the red door. There is another mouse trap located in the small room on the second door in the warehouse if you still haven’t found any.
After exiting the red door to head into Svyatogornyj South, place all your mouse traps on the ground. You then need to head back into the warehouse and then return to Svyatogornyj South.
You should be able to capture the Tsuchinoko. Make sure you have room in your inventory to hold it. If you don’t see the Tsuchinoko, place the empty mousetrap on the ground again and then repeat the process.