Convert retail key to Steam key?

Dead Space 1 & 2 retail keys are for origin

You could trade them I guess.. shrugs

Any way to do it?
Nope. He can only trade them to someone

Well...anyone interested?

Did you try replacing the key for the key steam steam?

If the retail keys are for Origin as simoli said, then you might be able to trade your Origin keys for Steam keys with someone, but this wouldn't be the right place for that.

IMPOSSIBRU!!

You cannot convert retail games into steam games. If you want a game like Stalker Shadow of Chernobyl or either of the Dead Space games on steam, you have to buy it through steam.

Just activate them on Origin Shudders

You can give them to me, I'll convert them for you >:)

Not all keys activate on Steam. It will only activate on Steam if in the product description it says it requires a Steam Account

Just these work https://support.steampowered.com/kb_article.php?ref=7480-WUSF-3601

only if it's a steamwork.