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alienswarm Recently, Valve took a page from stores that release free e-books, such as Baen or Amazon: it released a complete game, and all necessary development materials for the game, entirely free through its Steam digital distribution system.

Alien Swarm, from the development team hired to work on Left 4 Dead and Portal 2, does for the Ridley Scott/James Cameron bug-hunt genre what Left 4 Dead did for George Romero and zombies. Players take on the role of one of four space marines investigating a colony overrun with slimy alien creatures.

It is a complete, if short game—not a demo, and not a “freemium” game (like Dungeons and Dragons Online, which I mentioned in April) where you get the basic game for free but can buy cool weapons and powers for cash. It was programmed by the development team in its spare time (it’s an adaptation of an earlier Unreal mod by the same name), but the amount of polish is impressive and shows no signs of its hobbyist origins.

What does Valve get out of this? Unlike with Baen’s free e-books, there’s no “give the digital version away for free to sell a print copy” in this giveaway. There is no “print copy” of Alien Swarm, and even if they did sell it on a disc in a box it would just end up being installed through Steam anyway. And it is unlikely they will be selling later games in the series—even if they did, since they gave away the development tools, too, there is going to be enough free content generated that nobody would ever need to buy them.

But it does tend to resemble the free e-books that Amazon and Barnes & Noble give away for their Kindle and Nook readers. Just as you have to install the Kindle Reader to read a Kindle e-book, it’s necessary to install the Steam content delivery system in order to play Alien Swarm—and once Steam is installed it becomes very easy for a gamer to see something he wants, click, and buy it.

Perhaps this kind of “platform stickiness” will replace the give-it-to-sell-it model when e-books take enough marketshare away from printed books. Or perhaps there will just be fewer freebies.

Either way, Alien Swarm is fun, free, and a great excuse to install Steam. (And if any TeleRead readers should want to team up, my handle on the Steam IM network is Robotech_Master.)

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