
it varies check your counter strike CD case for it. or download cs from a website or torrents and u will have the CD key for that version in a notepad file. it probably should read "Key" or "readme" or "code" watever.. try
some cd keys for counter strike 1.6:
5RP2E-EPH3K-BR3LG-KMGTE-FN8PY
5ZN2A-JBSCK-SWYYI-DPHK6-CK3JX
5ZN2F-C6NTT-ZPBWP-L2DWQ-Y4B49
58V2E-CCKCJ-B8VSE-MEW9Y-ACB2K
5ZK2G-79JSD-FFSFD-CF35H-SDF4A
5Z62E-79JDV-79NAM-ZGVE6-ARBWY
5ZQ2A-NI239-4F4K7-H9N8Q-VTSYT
5ZN2A-JBSCK-SWYYI-DPHK6-CK3JX
5ZN2F-C6NTT-ZPBWP-L2DWQ-Y4B49
58V2E-CCKCJ-B8VSE-MEW9Y-ACB2K
5ZK2G-79JSD-FFSFD-CF35H-SDF4A
5Z62E-79JDV-79NAM-ZGVE6-ARBWY
5ZQ2A-NI239-4F4K7-H9N8Q-VTSYT
Counter Strike-Condition Zero cd keys :
5Z62F-CEKQD-4WCZT-TAWQH-JGLFQ
54RT2-843TJ-79UJC-ZGVC5-AR3R2
5ZN2H-NWHEY-RRM7H-PZAXA-GIFQJ
5Z62E-MTXQZ-Z32IY-NW22l-A3C4Q
5RP2E-EPH3K-BR3LG-KMGTE-FN8PY
54RT2-843TJ-79UJC-ZGVC5-AR3R2
5ZN2H-NWHEY-RRM7H-PZAXA-GIFQJ
5Z62E-MTXQZ-Z32IY-NW22l-A3C4Q
5RP2E-EPH3K-BR3LG-KMGTE-FN8PY




























