If you have Steam, you already can do this.
If it were this simple, they would've already done it in a less convoluted way.
OCH is $6.
The most common purchase is the $10 pack.
0.6*3500=2100ce
That would be 700ce for each tier.
How the hell do you expect T1 and T2 players to pay 700ce?

Actually, OOO already has announced something like that. Check around the "what is in development" threads.

Duke, most of players play "spiral knights" not "steam knights" so you can put your "omgz its on steamzzz" in your socks.

They did annouced it but are they really going to do it? Or maybe they put it there to make people kill topics like this with "oh but they said its in developement".

How about allow OCH owners to invite right about anyone once a new pay-to-play DLC is released.

I know that, that's why I said:
If you have Steam, you can already do this.
If it were this simple, they would've already done it in a less convoluted way.

OP revealed (s)he's a F2P Steam user who wants to buy the "DLC" with CE. I'm saying how the OP can already do that. The rest of that post is just me poking holes in the math and logic.
I'm perfectly aware that you still can't be F2P and have OCH if you're not on Steam, but Valve is their valued partner and most knights used Steam, so it makes sense to do that first. OOO says they're developing it for their client, and the only thing you can do is wait or move on, and OOO has a track record of (eventually) keeping their promises. They're handling like 4 MMOs right now, so forgive them if making heavy changes to make old content slightly more available at limited profit isn't the highest of their priorities. They even said that purchasing OCH isn't treated like ce packs and elevator passes, if that's a hint as to why it might be slightly more complicated than just making another key.

Just buy it. Getting the key is the same thing as a reduced cost. If you want it, go buy it. The rewards are pretty worth it.

It's Zeph the anti-F2P Virulisk.

What else would you ecpect from him?

Are you sure you should be making these statements?

Most of the Game is filled with F2Ps. We love this game. We want to play OCH. So if you don't know what you're talking about after playing for like a week, log off and play football. We may or may not have the credit cards or we can't afford it. We can't play a part of the game equally, with weapons that can 1KO you? YEAH, that's fair. Only steamers can trade it. So we should get a way to get it on client and Kongrate.

So if F2P want it, it's basically We don't support OOO. Just log off.

It felt like a bait and switch when they changed expansions to Pay only. So yes, we will complain.

I would say not to make it free, but make it tradeable like useables and it binds on equipping. You can only equip one only and you can trade it with others. So

http://forums.spiralknights.com/es/forum/41

There is no good reason for the OCH expansion (or any other update) not being available for every F2P player out there. While I'd personally prefer a fixed CE price, making expansions tradeable between players - all of them, not only those using Steam (not everyone wants or can play on Steam) - would be fine with me as well.

It's great that some players can acquire this content for free but it's simply not enough as long as some are left out in the rain. Denying a significant subset of the community this content (both the mission itself as well as the rewards) effectively removes the F2P status from the game (at least in my book). We're not talking vanity or convenience items here - for which paying real money is absolutely fine as far as I'm concerned. This is content and equipment that some people simply cannot access, placing them at a certain disadvantage (no matter to what extent) compared to paying players.

I stopped playing on the day the OCH Update hit the servers. I wasn't entirely F2P myself (having purchased a few elevator passes) and wouldn't have minded paying for the expansion if there had been the possibility of getting it for free (my time is not worthless, just making a point here). I'm on Linux and won't be using Steam even when it becomes available, thus effectively forcing me to pay for content relevant to the story line and denying me of several pieces of equipment. I signed up for an F2P game and can't see myself playing again as long as OOO keeps going down that road.

PATV also did an episode on microtransactions and on the importance of F2P players to a game such as SK. It's certainly worth watching (as are most of the other episodes) and I can only recommend it - especially to those people apparently looking down on F2P players. http://penny-arcade.com/patv/episode/microtransactions

Can somebody (maybe even someone from OOO) confirm that purchasing OCH with CE is possible on the asian server?
How long has this been possible? If it is due to a recent update we might get that option soon enough ourselves. If it is indeed possible on the asian server, an ETA would be appreciated.

While that might be true, OOO mentioned several months ago they we're working on making a mechanism such as this possible on here. And while the Asian server obviously is managed by a different publisher, it's still the same game. So it should be possible for OOO to provide OCH and other expansions to free users by means of CE, at least from a technical point of view. No one said they have an obligation to do so, just that such a decision would make quite a few people happy.

Teddy, Three Rings owns Spiral Knights. Sega owns Three Rings Design. Sega is also the publisher of the USA/EU version (this one) of Spiral Knights. There's some different publisher for the other game of Spiral Knights, which is still developed by Three Rings.

Expansion suggestions can be suggested in the forums too, so we can add more expansions to the pack