3JDSMAX6

You need Windows XP to use 3DSMAX6

Deer Hunter 2005 (officially Deer Hunter: The 2005 Season, released in late 2004) was developed using 3ds Max, making 3ds Max 6 or 7 the ideal versions for creating or modifying game assets. The game, developed by Southlogic Studios, supports user-created content (mods) including custom weapons and, to a limited extent, map modifications. 

3ds Max 6 and Deer Hunter 2005 Workflow

Modeling Software: The game assets, including animals, weapons, and environmental elements, were created using 3ds Max.

Modification Focus: The most common modding for this title involves creating new reticles, weapon skins, or modifying textures (often in .png or .tga format).

Model Formats: While not explicitly detailed in the documentation, games of this era frequently used .3ds or specific proprietary mesh formats. The Game Institute tutorial from 2005 suggests techniques such as Loft (creating meshes by extruding shapes along a path) were common for creating 3D objects at that time. 

Here you can download 3DS MAX 6

Here you can download 3DS MAX 6 PLUGIN EXPORTER

Here is a tutorial for Tree Animation