Likely origin
Half-Life 1998-11-19
Sources
Textures, by WAD
halflife.wad · 118
+0medkit+0recharge+0~fifts_lght5+0~generic85+0~generic86b+0~generic86r+0~tnnl_lgt1+0~tnnl_lgt2babtech9dbabtech_bordl9babtech_ceil02babtech_dr1cbabtech_dr4cbcrate08brdly2_btile1c1a1_flr1c2a2_drcardbox1cardbox4cardboxbot1cardboxtop1cardboxtop2con1_bord02con1_wall01pcrate03crate06crate09crate09bcrate09ccrete2_flr03ccrete3_ceil03ccrete3_flr04crete3_wall02crete4_stp01crete4b1drkmtlt_bord11duct_wall04fifties_ceil01fifties_dsk5aflatbed_engineflatbed_hlite2flatbed_podflatbed_tlite2flatbed_topfreezer_bx9generic006generic012generic014hgeneric101dgeneric105generic105ageneric105bgeneric105cgeneric109generic86generic87ageneric87bgeneric87clab1_brd3glab1_cab2lab1_stair2blab1_trim3medkitedge1metal_wall01bout_slat01out_snbagout_snbagcout_w8dr1out_wall1aout_wall4apfab_dskdrwrposter14poster15rechargeedge1redrocketennozrocketmainrocketnoserocketpayloadrocketseprocketstage1silo2_gad1silo2_w2bsteelstripes2stripes5tnnl_brd1tnnl_flr12atnnl_flr2tnnl_flr3btnnl_flr8tnnl_lgtbrd2tnnl_swr1tnnl_swrc1tnnl_w12a2tnnl_w12c2btnnl_w14atnnl_w4tnnl_w4btnnl_w4b4tnnl_w4ctnnl_w5ctnnl_w5dtnnl_w5ftnnl_w6tnnl_w7tnnl_w7btnnl_w8{grate4a{ladder1{rail1b{tension3~lab1_comp3f~light3b~light3c~light3e~light3f~tracklite