Half-Life Hints & Cheats

Cheat Codes

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

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	360K
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