Placing an emphasis on using the crossbow in a world loosely inspired by Fallout 3, 99 Bolts plunges you into an irradiated sniper mission.
The current wasteland map is getting the detail touch-ups it really needs, I start making some indoor areas for the player to explore, and I start a "trap zoo"...where I build prefabs of the various traps that will populate 99 Bolts.
These indoor areas are looking WAY better.
The only thing i could recommend would be to...
Add lotsa decals to wall and floor.
Make use of the composite trash models. Easy detailing without placeing multiple props on the ground.