# Half-Life 2: Raising the Bar

> 2004 book by Valve Corporation

**Wikidata**: [Q1980191](https://www.wikidata.org/wiki/Q1980191)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Half-Life_2:_Raising_the_Bar)  
**Source**: https://4ort.xyz/entity/half-life-2-raising-the-bar


## References

1. [Source](https://half-life.fandom.com/wiki/Black_Mesa_Research_Facility?oldid=311755#List_of_appearances)
2. Combine OverWiki
3. [Source](https://half-life.fandom.com/wiki/Half-Life_2:_Raising_the_Bar)