Let's make a list! Post download links to files related to Valve's games. My list is enough to warrant its own thread, but please share your own. I'm sure I'm not the only one who keeps old downloads.
Counter-Strike (mod) installers (Windows)
csb10full.exe
csb20full.exe
csb30full.exe
csb31full.exe
csb40full.exe
csb50full.exe
csb52full.exe
csb60full.exe
csb61full.exe
csb65full.exe
csb66full.exe
csb70full.exe
csb71full.exe
CSB71V2.exe
csv11full.exe
csv13full.exe
csv14full.exe
csv15full.exe
Counter-Strike (mod) patches (Windows)
csb30-31up.exe
csb40-50up.exe
csb60-61up.exe
csb6065.exe
csb6566.exe
csb6670.exe
csb7071.exe
csv1011.exe
Counter-Strike (retail) patches (Windows)
cs1004.exe
csretailv1005.exe
Counter-Strike (mod) Dedicated Server (Windows)
standalone52srv.exe
Counter-Strike (mod) server files (Linux)
cs_beta31.tar.gz
cs_beta52.tar.gz
cs_beta61.tar.gz
cs_beta65.tar.gz
cs_beta66.tar.gz
cs_beta7.tar.gz
cs_beta71.tar.gz
cs_10.tar.gz
cs_13_full.tar.gz
cs_14_full.tar.gz
cs_15_full.tar.gz
Counter-Strike (mod) server files patches (Linux)
cs_beta7071.tar.gz
cs_14_upgrade.tar.gz
cs_15_upgrade.tar.gz
Half-Life patches (Windows)
10051016.exe
10051100.exe
10051110.exe
11001101.exe
11011104.exe
11041106.exe
11061107.exe
11071108.exe
11081109.exe
11091110.exe
hl1016 (downgrader).exe
Half-Life Dedicated Server installers (Windows)
hlserver4016.exe
hlserver4109.exe
hlserver4110.exe
Half-Life Dedicated Server packages (Linux)
hlds_l3014.tar.gz
hlds_l3016.tar.gz
Half-Life Dedicated Server patches (Windows)
hlds41084109.exe
hlds41094110.exe
Half-Life Dedicated Server patches (Linux)
hlds_lupgrd3016.tar.gz
Mods
2008_05_04_HLWE1507.exe (Half-Life: Weapon Edition)
2006_01_04_ios4.exe (International Online Soccer)
2005_10_02_brainbreadv1.2.exe
2005_10_13_bi_hhdeath_1.2.1_win_update.exe (Household Death)
2005_10_11_bi_hhdeath_1.2-full.exe (Household Death)
2006_10_15_dpb_gold.exe (Digital Paintball)
2006_10_15_dpb_gold.tbz (Digital Paintball)
2008_02_18_pvk_2.31_setup.exe (Pirates, Vikings and Knights)
2010_02_08_si11.exe (Science and Industry)
2010_02_08_si11_server.tar.gz (Science and Industry)
Counter-Life_Beta_7.zip (Counter-Life)
2008_12_25_CL_Version_1.zip (Counter-Life)
tfc.7z (3 Team Fortress Classic maps - alpine, btube and openfire)
2009_03_08_firearms_v30_full.exe
2005_11_11_MonkeyStrike12c.ZIP
2010_02_09_BumperCars_12_Full.zip
2010_01_28_bumpercars2.0.exe
2010_02_02_over_ground_1.0_full.exe
ps07b26a.exe
InstallHL2JKS.exe (Half-Life 2: Jaykin' Bacon Source - don't be fooled by the name, it is a Half-Life 1 mod)
2010_01_28_wormshl-b3.2.exe
2010_01_28_wormshl-b3.2LNXServer.tar.bz2
frontline18bfull.exe (Frontline Force)
flf2.0finalwin.exe (Frontline Force)
Tour of Duty
2005_10_02_tourofduty_120.exe
tourofduty_1_20_to_1_21patch
2006_03_14_tod_1.3.exe
Hammy-Bob Mod
2005_12_17_hbm.zip
2005_07_07_hammy-bob-classic.zip
2008_12_23_hbmchristmasnightmare.rar
2005_07_04_hbmxmas2.exe
Day of Defeat
dod_v10.exe
dod_v10_linux.tar.gz
dod_v10b_linux_server_patch.tar.gz
dod_v2130.exe
dod_v2130_upgrade.tar.gz
dod_v30.exe
dod_v30_full.tar.gz
Flat-Life (hl2d)
flatlife11full.zip
flatlife11to12.zip
flatlife_v1.3_src.zip
Half-Life Rally
2005_07_13_hlr-b10.exe
2005_07_12_hlr-b10-ded-win32-lin.zip
2005_07_13_hlr-b10-11.exe
2005_07_13_hlr-b10-11-ded-win32-lin.zip
Spirit of Half-Life
SpiritSource18_VS2008_compatible (Unofficial)
Spirit15a4.zip
spirit15alpha4source.rar
Spirit18a1.zip
SpiritSource18.zip
Ultimate Redemption
redemption_walkthrough.zip
Redemption_1108_patch.zip
Redemption Screen Saver.zip
redemption21.exe
Wanted
wanted_walkthrough.zip
wanted_dm6_unofficial_map.zip
wantedhl_voodoo_fix.zip
Wanted Screen Saver.zip
wanted16_patch.exe
wantedsteamport.zip
wanted15.exe
Mapping
FGDs.7z (Various versions for: Counter-Strike, Half-Life, Blue Shift, Opposing Force, Day of Defeat, Deathmatch Classic, Team Fortress, Ricochet, Condition Zero Deleted Scenes)
wanted_fgd.zip
hammer_v34.exe
hammer_3.5.rar
terraingenerator305.exe
gunman.fgd
resgen_2_0_2.7z
spirit14fgd.zip
submerged.rar (submerged.wad)
Gunman Chronicles
abode50_map.zip
Gunman-Gunman_Project.mp3
Gunman-Raptor_Attack.mp3
Gunman-Watch_your_Head.mp3
Manual.pdf
Gunman_Steam_Patch.zip
James Bond 007: Nightfire
alurazoe100.zip (Tools for editing assets.007)
alurazoe100src.rar
Nightfire_jbnf_007.txt (Alhexx' Nightfire .007 File Format Analysis v1.10)
nightfirepatch11.exe
Half-Life SDK
Clean-Half-Life-SDK-p3-VC-2008.zip/
hl_sdk_v23.exe
hl_sdk_v23_source-update-p3.zip
metamod.hlsdk-2.3-p3.txt
metamod.hlsdk-2.3-p3.patch
hlsdk-2.3-p3.tar.gz
hlsdk-2.3-p3.zip
Other
Half-Life_Day_One.rar (The first Half-Life demo)
halflifedemo_uplink.exe (The second and last Half-Life demo)
steamlink-1.3.exe (Unofficial Steam port of Uplink)
valve_intro.zip (Original Half-Life Valve intro)
FurtherData.zip (Model/logo/map pack from Valve/Sierra)
Half-Life - Uplink (Movie by Cruise Control) (Downloaded From Youtube).mp4
shaderwater-implement.zip (MechMod water code)
cs_mappack.exe
high_ping_bot_3_0_plus_source_code.7z
monster_plugin_src_3_0.zip
woncomm.lst (For Phalanx's master server)
mdldec_1_2.7z
studiomdl.exe (Latest, with transparency support, from DoD 1.3)
CSS de_port_whiteboard.gif
DoD Design Document.txt
DODPOSTER.JPG
Early DoD Source image_30883.jpg
Early Version of Half-Life.mp4
HL beta gameplay and interviews.mp4
HL Beta Ultimate video.mp4
HL Automated turret gun.mp4
HL Exploring the sewers.mp4
HL Old Trailer.mp4
HL Train Demonstration.mp4