UT3

Blocking volume
Build your own BV to obtain a smooth traveling on rocky surface

Copy assets
Copy Epic and custom assets (static meshes, textures, materials, etc.)

Lighting
Lightmap and Vertex on BSP and static meshes (aka SM)

Optimization
Optimize your level

Sounds and music
Add custom music
Assign a proper sound on assets (materials, MIC, SM, BV, GV, etc.)

Weapons
Add the Enforcer