elevator_roof_collar_glass
glados_screenborder_curve
rail_horizontal_straight_128
glados_wheatley_boss_animation
silhouette_cable_cluster01
glados_wheatley_boss_screen
metalwall_bts_006d_gradient
backpanels_color01_nospec
indicator_lights_corner_floor
indicator_lights_corner_wall
signage_overlay_catapult1
concrete_modular_floor001e
signage_overlay_catapult2
observation_tileceiling001a