question

That sounds awesome! But if I'm not on Steam yet and only pc/max/Linux, which do you recommend? Seems that most Choices are mobile devices, if not in Steam yet. 

Any Stripe support? They are international and so friendly when it comes to api/sdk. And their payment UI looks friendly for customers, doesn't look sketchy at all. Star Citizen uses them too. 

Also when you say PayPal, does this include Braintree by PayPal? 

Also, any estimates when the docs will come? Not sure if that's a "next month"  soon or "next year"  soon ;) 

We've talked about Stripe internally, but there hasn't been enough demand for it from developers to push it up our priority list. We've actually had more people ask for Xsolla, which is why it's on our Add-ons page as "Coming Soon" (later on this year). But I'm going to add your name to the Stripe backlog item, so that we have a record that you expressed interest.

For PayPal (which is what I was going to say would be the main recommendation if you're PC, but not Steam), we support their core service. Braintree, which was acquired by PayPal in 2013, is actually a distinct service with a separate integration path. That one's had only one other request for it, so it's pretty far down the stack right now.

For the StartPurchase doc, I'm currently working to make time to complete it, so I'm going to say next month, as a forcing function to make sure I get it done soon. :)

Never heard of Xsolla until now -- I asked them how easy it is to currently integrate with PlayFab, and the customer service agent in live chat told me to "look at the docs if you're an experienced programmer" -__- not necessarily the best first impression.

Also the Unity SDK has pretty nasty negative reviews, however, it's been updated since the last negative review and no news MAY be good news..https://www.assetstore.unity3d.com/en/#!/content/35719 -- but with the average comments all the way down the page are 1-star "Misleading and non-functional" related reviews.

I saw their demo and it looked quite magical - I am willing to try them out, but I'm a bit skeptical from what I've seen, so far, from them.

It seems their overall support satisfaction and "trust" levels are extremely low (3.7/10):
https://www.trustpilot.com/review/secure.xsolla.com with some further nasty reviews.

Just a heads up ~ for myself too, since I'm diving in to check them out!

EDIT: Signed up via linkedin, nothing happened after clicking authorize. I tried to register and said email taken -- linkedin register must've worked somehow. I tried using my email to login "Oops! Method not allowed". Wha? Refresh page -- repeat -- nothing works. Can't register - can't login.

Gimped website..

EDIT 2: 2nd time with their live chat, and it's completely outsourced. Every response is very generic and irrelevant to anything I ask. Getting frustrated.

EDIT 3: Apparently when you sign up via linked in and click forgot password and try to sign in with a new password, it auto-blocks you. It says to contact support. Talk to support a 3rd time and they said "Sorry you should contact a guide in the game you are playing". Seriously? ..? 

So, about Stripe, you may want to seriously consider it :P Their flow is pretty straight-forward: Request a token, make a call to show UI (automatically generated by stripe), then they send everything in a combined longer token for validation, send back a true/false for success. If success, includes extra options like saving a hash for future use or the last few digits for display of saved cards, etc etc.

This reply deserves it's own post:

So still messing with Xsolla, I discovered that, finally, I cannot sell my game using their services unless I'm ALREADY on Steam. Where, in that case, I may as well use the Steamworks SDK:

https://i.imgur.com/KXrRD9U.png

I cannot move on without being on Steam, Xbox, Origin, PSN, Ubisoft's joke site, or DRM free. They piggyback on other services rather than actually having their own service. How unfortunate :(

In other words, any indie dev that didn't pass Steam greenlight yet cannot use Xsolla,

and those that are, may as well just use Steam SDK unless it's Xbox or PSN. I can only see advantages if you're on consoles that are already approved by Xbox/PSN.

Finally, I discovered their payment system they use is PaymentWall, which sounds like a trademark, but it's actually a 3rd party payment service literally called PaymentWall, and they charge 25% per transaction on average. I'm wondering if they charge "5% + [paymentwall's fee]." Be careful.

So, to be clear, we're not integrated with Xsolla yet, so I actually wouldn't have advised doing all the work you just did. Two key points to our Add-ons Marketplace are:

1. We pre-integrate everything we can, in order to minimize the amount of work you'll have to do, and

2. We negotiate with the other company to get you a rate at or below what you'd pay going to them on your own - preferably below.

My recommendation would be to use an existing integrated service, or if you're not shipping imminently, wait for the PlayFab integration.