Half-Life Hints & Cheats

Cheat Codes

Cheat	Effect
Up, Triangle, Up, Triangle, Up, Triangle, Up and Triangle	Alien Mode
Up, Triangle, Down, X, Up, Triangle, Down, X	Xen gravity
Right, Square, Up, Triangle, Right, Square, Up, Triangle	Slow motion
Left, Square, Right, Circle, Left, Square, Right, Circle	Invisibility
Left, Square, Up, Triangle, Right, Circle, Down, X	Invincibility
Down, X, Left, O, Down, X, Left, O	Infinite Ammo

Unlock all Decay missions
Go to the Options, then Cheats. To enter the code you must have two controllers.
Password Effect
p2_R3, p1_L3, p1_up, p1_up, p2_down, p2_down, p1_left, p1_right, p2_left, p2_right, p1_X, p1_O, START All Decay missions unlocked including bonus mission Xen Attacks

Password	Effect
p2_R3, p1_L3, p1_up, p1_up, p2_down, p2_down, p1_left, p1_right, p2_left, p2_right, p1_X, p1_O, START	All Decay missions unlocked including bonus mission Xen Attacks

Bonus Alien Mission
Get an A-grade on all 9 of the Decay missions. If you successfully do this, you'll get to play a 10th level as a Vortigaunt alien. Getting an A-grade on this level will formally unlock the Alien Mode. (Note: the best way to ensure an A-grade for a level is to get at least 25 kills.)

Uplink Mod
For this code to work, you will need a copy of Playstation Magazine Issue 57 (The one with Jango Fett on the cover) and it's demo disc. From the Half-Life main menu go to option and the the cheats menu. Enter the following cheat: Triangle, Square, Left, Right, Circle, X, Up, Down. It should open an extras menu on the options screen. Go to the extras menu and it should say opening disc tray. When it opens remove the Half-Life disc and put in the issue 57 disc and it should load the Half-Life Uplink Mod. Enjoy!

Type	Name	File Size
Walkthrough	Walkthrough by sdunigan	349K
FAQ/Walkthrough	FAQ/Walkthrough by arkena	163K
FAQ/Walkthrough	FAQ/Walkthrough by RainingMetal	102K
Other	Weapon Guide by Yojimbo_Beta	55K
FAQ/Walkthrough	FAQ/Walkthrough by NotoriousNick	82K
FAQ/Walkthrough	FAQ/Walkthrough by SefSermak	185K
Other	Uplink FAQ/Walkthrough by Cold NRG	17K
Other	Game Script by wel	28K
FAQ/Walkthrough	FAQ/Walkthrough by cless alvein	65K
FAQ/Walkthrough	FAQ/Walkthrough by black hole sun	86K
FAQ/Walkthrough	FAQ/Walkthrough by GMorrissey	181K
Other	Decay (Co-Op) Mission Walkthrough by Evil Nep Brothers	81K
FAQ/Walkthrough	FAQ/Walkthrough by Collider	21K
FAQ/Walkthrough	FAQ/Walkthrough by DC	58K