* New single player campaign modes: European Extreme mode is a nightmare/legendary difficulty with all the Substance features but no extra encounters - best for low-level hardwares the Gordon Tales are an alternate take on Freeman's arrival to C17, which start with a new intro and follow his steps in the Seventeen Years War - think of the chaos of the 'Follow Freeman!' chapter,only from the beginning while Survivor mode is based on health management and trades Halo shields for medikits, so you must save and leech health or an error too many in the canals could prove fatal only in the citadel! System requirements: 1G ram, 2.5Ghz processor for medium detail. Welcome to the real Substance, what action is made of!Ī fully updated,legit copy of Half-life 2 is required in order to install and play Half - Life 2 : Substance.

Half - Life 2 : Substance GOLD gives the HL2 single player campaign harder challenges and hectic action: 4 gamemodes to test your skills with, a wide array of weapons and 5 different player classes to best suit your gaming style.

Half life 2 manhack