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User rating: 3.0/5 (3525 votes) (?)

The rating system is based on votes by visitors to this site, and not the opinions of HL2 Mods UK. In order to maintain as fair voting structure as possible, please only rate mods you have played, or, for unreleased mods, ratings are based on anticipation of the game, in a 'most wanted' kind of way. Hide info
Screenshot Single player
Released: Yes

HL2: Substance enhances the HL2 single player experience John Woo style, has a new action oriented gamestyle, deadly challenges and extra gorish killings make it the best choice for HL2 veterans who hunger for more replay value. Welcome to the real Substance, what action is made of!