Using Coordinates

Greetings, I am very new to 3D modelling. I have component models for a game which are in a text format, where the mesh is described using vertex coordinates. I was wondering if it is possible to input a set of coordinates and construct a model that way, and also to see a list of the vertex coordinates which I can copy back into a text file when I adjust a shape or make one. This is a problem as the game I am modding is old and incompatible with Blender. Any help would be appreciated.

If you know the file format which your game uses, you could change it to https://en.wikipedia.org/wiki/PLY_(file_format) to import in blender.
Export model in ASCI version of ply and convert back to one your game uses.

Thanks for the reply, I will have a go.