Why are some free games sold on steam?

cos gaben wanna all money in the world. and burger

No idea why Kingdom Rush is paid on Steam (even in Android its free) but Super Meat Boy is basically an expansion for Meat Boy thats why its paid on Steam

its not valves who makes them paid its the greedy publishers and developers it mostly happens to mobile games ported onto the pc,+super meat boy is way better than the flash version (meat boy)

The original Meat Boy is more like a prototype for Super Meat Boy. It is not the same game.

Though it can be purchased on Steam in the Basement Collection. :P

Because they're not the same game?

"Super Meat Boy" and "Meat boy" are not the same game. Meat boy could be considered as a prototype for the full game. Kingdom Rush, on Steam, has more content than the free version.

You also have to understand that while you get to play for free on Kongregate, you're still paying in a way with the ads. (Unless you're the kind of jerk that uses an ad blocker and steals the site's bandwidth)

I think Hero Siege technically qualifies (it's a Free-to-Play title on mobile.)

I'm pretty sure all such games have some changes to the Kongregate versions. Besides, why not? If you think they're the same game, go play them in Kong.

generally steam versions of things tend to be improved/expanded.

Magicka: Wizards of the square tablet steam version has every piece of gear unlocked.

There is more free games on Steam, like Final Slam 2, that awful game that got to Steam because they asked for votes and gave free keys, this game and same version is free on Flash games websites.

Cave Story+, Black Mesa, Turbo Dismount, Gang Beasts, but these at least are good games, and have more features in steam version.

blck mesa, worst example as it was free some time ago on steam...

Tales of Maj'Eyal can be played for free as well. The Steam package does kick you a few small goodies though. Great game, despite being stupid hard.

Cuz Trading Cards.