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Half-Life 2: Episode One Hints
PC Cheat Codes
Episode One pretty much uses all the same cheat codes as the original game, with the obvious exception that the map codes (listed below) are all different. Also, there are only six chapters to unlock (including the "Coming Soon" thing), not fifteen.
Backgrounds for main menu screen -- ep1_background* (01, 01a, 02)
If you'd like a combat preview of the new hunter enemy that you'll have to deal with in Episode Two, use the code below to summon one up. (NOTE: This preview version is only vulnerable to explosives, unlike the ones in Episode Two.)
