How long are the keycodes from Kickstarter good for?

[Lance Gilgamesh]

Hello, today I got my skirmish keycodes today for backing kickstarter and since I already have skirmish mode I was wondering how long are the keycodes good for? I'm guessing I can just turn in the keycode for skirmish for a gift copy on steam but what about the keycode for the soundtrack and costume pack? Can I just keep them around to give away or is there a set time I have to use them by?

PS: Sorry if this is the wrong forum I'm not really sure where a question like this belongs.

[dragonmere]

You can't redeem the code for Skirmish on Steam. Just save it and send it to a friend, or whatever you see fit. You cannot redeem an activation code for a game you already own, with a few exceptions - mostly Valve games.

The codes will not expire ever, as far as I'm aware. I've been sitting on a few for at least a month, and they still work when I pass them out.