anything from here )
https://www.steamtrades.com/trade/CzQUe/h-games-w-games-i-dont-own
Hero of the kingdom, The Keep, Crusaders of the Lost Idols: Elite Starter Pack, and Elements - Soundtrack for both?
I prefer 1:1 trades, and The Keep seems bit too much to ask for those games of yours (one 5,99 game, and other one which looks like a mega cheapie and that one can't even be bought). But thanks for offer, and if you can take some game under 5€ on Steam value + Hero of the kingdom , that sounds better for those. And that's without that Crusaders of the Lost Idols: Elite Starter Pack included.
If it's 1:1, how about Wormhole City for Hero of the kingdom?
As for Zombies Berserk, since it's unbundled and currently purchase disabled, I kind of rated it a bit high. Sure it'll be bundled, which I think is sooner rather than later, but that's for another day when it's actually happen. If you don't mind waiting, then I suggest to wait for when it got in a bundle.
Wormhole City for Hero of the kingdom is ok, if you want to value that Zombies high you can of course do that, it has no special value for me, but you can of course do as you wish :)
But let's do that first one then.
Wormhole City
Games I don't have