Couldn't answer for sure but for you can buy them as a bundle on steam I'm going to guess it's one key but for you can play all the levels from the 1st game on the 2nd one there's hardly any need to even buy the 1st one.
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that & you might as well throw a little bit more money at them & buy the valve complete pack which has both in & more
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& that's before the 20% off voucher code GMG20-ZB5D1-93X49
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if that's the case I would probably wait & watch the winter sales because no doubt it will go 75% off making the 2nd one £3.75 or the bundle pack £5.80
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but if you're set on the bundle then you might as well just get it from GMG because you can use that discount code & get it for £4.60
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Someone on Neogaf said that, Don't have account there so can't help more.
Additionally this on SteamDB:
http://steamdb.info/sub/36144/#section_info
billingtype No Cost (0)
And since there's no dicount I'd say it sounds plausible.
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are there 2 separate keys or a single key for the bundle?
thanks for the answers :)
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