This mod is intended to enhance Wolfenstein single-player and improve gameplay balance, making it feel more like a true sequel to the 2001 game Return to Castle Wolfenstein. Retrostein combines the powerful weapons, paranormal abilities and regenerating health of Wolfenstein 2009 with the tough enemies of RtCW, ensuring that the game maintains a fair level of challenge throughout. Now Heavy Troopers and Elite Guards will be enemies to be feared, and you will want to buy ammo for special weapons like the Panzershreck and Tesla Gun. Retrostein also includes some (but not all) of the HUD/movement features from Neurological's "NeuroWolf" mod, designed to make the game feel less "consolized".
I felt like this mod made the game actually playable, ups the challenge and makes the game actually fun!