My friend does some heavy mods for it; I was playing this all the way back into the first build. Very good game but it has a lot of bugs that needs to be fixed, your character will sink into the ground if it is too heavy. Modding is a piece of cake though so no need to worry; you can go in and edit the character's weight. Only basic knowledge is required to edit, its mostly common sense and the open code is self explanatory...
All in all I completely agree with tree, it’s an overall flippin sweet game