This is a steam gift. Valve Complete Pack, stated as "Unknown package 29197". Steam support said it's all good to be redeemed, unfortunately it's restricted to RU/CIS so I can't use it.

Pack includes:

• Day of Defeat
• Day of Defeat: Source
• Deathmatch Classic
• Ricochet
• Half-Life
• Half-Life: Source
• Half-Life: Opposing Force
• Half-Life: Blue Shift
• Half-Life Deathmatch: Source
• Half-Life 2
• Half-Life 2: Deathmatch
• Half-Life 2: Lost Coast
• Half-Life 2: Episode One
• Half-Life 2: Episode Two
• Portal
• Portal 2
• Team Fortress Classic
• Team Fortress 2
• Left 4 Dead
• Left 4 Dead 2
• Counter-Strike
• Counter-Strike: Source
• Counter-Strike: Condition Zero
• Counter-Strike: Condition Zero Deleted Scenes
• Counter-Strike: Global Offensive
• Counter-Strike: Global Offensive - SDK

Good luck! : )