Here is the 100 missions achievement save. This save for NUNS3 full Burst has 99 mission done.All you need to do is beat the last mission and the achievement will unlock.
Note that you will obviously need to have the Full Burst disc or have downloaded the game upgrade for this save file to work.

Enlightenment Achievement Save File
https://mega.nz/folder/m0tRgBpQ#PqXCcu1t1Y_RQUIopPfOiw