From Combine OverWiki, the original Half-Life wiki and Portal wiki
- ...that the HEV Suit is incapable of withstanding extremely cold temperatures?
- ...that the F-117 Nighthawk was to appear in Half-Life?
- ...that according to most advanced algorithms, the world's best name is Craig?
- ...that the Half-Life 2 Barnacle was to have another version, the Sand Barnacle?
- ...that the Antlion Guardian was originally called the Antlion King and was to appear in Half-Life 2?
- ...that Civil Protection officers are unaltered humans, unlike Overwatch Soldiers?
- ...that the known Xen crystal colors are yellow, green and violet?
- ...that the proper name of the Test Chamber in Sector C is Test Lab C-33/a?