World of Goo is an award-winning, physics-based puzzle/construction game made entirely by two guys. Grab living, squirming, talking globs of goo to build structures, bridges, cannonballs, zeppelins and giant tongues. The millions of Goo Balls that live in the beautiful World of Goo are curious to explore—but they don't know that they are in a game, or that they are extremely delicious. World of Goo Corporation is contractually obligated to state that everyone is a winner, and is enthusiastic to celebrate everyone's Goo building opportunities equally.
About World of Goo
Its a bit of a misrepresentation to say it was 'entirely two guys'. I'm not trying to diminish their work, plan, skill, risk, time, and money invested. They really achieved something by going for it. But, they had help. First of, there was a mysterious '3rd employee' of 2D boy at one time. He helped with WoG. Mantis Bug Tracker, Open Dynamics Engine, SDL, Subversion, and TinyXML are open source projects maintained by countless volunteers. Also the PopCap Games Framework was used. In addition, the two guys established an extensive community that made suggestions, designed levels, and tested the game. But most importantly, the community translated, and still is translating, the game into different languages. How about 'mostly two guys' or some variation?
People who made the used libraries, random comments from community, etc. are not proper to be credited. Library makers had no part in making the game, only providing tools for its easier creation. That's like crediting who made the brush and colors (or the editor, operating system, or anything else used during the creation process) for a piece of art. Community contribution varies from game to game, but is more likely on the same level as post-release bug fixes or other minor adjustments. Anyway, the level of indirectness of making the game is like crediting your local government as being instrumental part in the creation of the game.
What you say is essentially true except I think you've vastly underestimated the role of the community in the development of WoG. They did things for the game that are usually done by paid developers. For instance, I would give name credit to the translators; 2D Boy does.
Translations are hardly vital for the development of a game, and fan translations aren't that new concept (though including fan translations in official release is).