hitclub: Can I take Cities in Motion 2 and leave Incoming Forces on Steam ?
I'm sorry, but I'm going to decline that offer. I'll also explain why.
I grew disenchanted with this thread here many months ago, because it had become infested with leeches who would only offer lowest-value keys of games that everybody already had. Even if someone made a high-quality addition to the list, the leeches usually brought the quality down within 2 swaps max.
I was very happy to see someone offering "Tesla Effect (Steam)", which has (to my knowledge) never been available for less than 5$ in stores, has been bundled only once (in Nov 2014), and is a pretty darn good game (though the latter is obviously a matter of opinion). Thus, in order to add something of comparable quality to the list, I offered "Cities in Motion 2", which (to my knowledge) also has never been available in stores for less than 5$, and has not been in bundles since Dec 2013, when it appeared in the BTA tier of the Humble Jumbo bundle.
You have first offered a game that has been available for free (BoxesWithGuns) for Sword of the Stars, and now offer "Incoming Forces" for CiM2. Incoming Forces is usually available together with "Incoming" for about 1.50$ when it goes on sale, and it has appeared in two bundles within the last 12 months. On Steam, Incoming Forces is available for a dollar right now. It's not a completely worthless offer, but I really don't think it's on the same level as Tesla Effect / CiM 2 are.
Of course, I may be wrong about something. So if there is a good reason why swapping CiM2 with Incoming Forces would not devalue the list of available games, then please state it, I may have overlooked something.