Review of Half Life 2 powered by the Slant community.
Steam RatingOverwhelmingly Positive
Ranked in these QuestionsQuestion Ranking
Pro Many mods will run with just the free Source Engine installed
A total conversion which does not directly use any assets from Half Life 2 can be played without even purchasing the base game.
Pro Supports total conversions
The Source SDK allows mod creators to build new game content from the ground up, leaving no trace of Half Life 2.