So let me clear all confusion at first, this IS a Paid job, though it's not upfront paid, we simply don't have the money to pay upfront or else we wouldn't be having a Kickstarter, many people claim that they do not like these terms and that's totally fine, I just ask you that if you disagree, do it by PM as it doesn't add anything to the confusion.
I am Slykor (Vasco Bento is the real name) and I'm the producer and programmer for Oblivion Games, we're simply a small team that's currently working on a 2D fighter in the likes of SF/Skullgirls/Guilty Gear, etc...
We currently have about 4 people working on the project and we just need one more vital person to the project which is the "spriter", which would get our assets done so we could really start the project, we have some art already and we have some music undergoing atm.
We ask you that if you're interested to not consider this as a "job" but more of a "professional hobby" as we do not think you would benefit from having this as a job.
Now, because of this "special term" we aren't going to let you make all sprite sheets for all the characters without getting paid, our term is having 2/3 character sprite sheets all done so we can have a running demo and when the Kickstarter/Indiegogo campaigns are done, we would pay you for your past and future work.
We're seeking people with experience with HD sprites, we're just asking for the biggest size you can get while confortable with it, we aren't going to ask you a full character done in a week, we ask you that you take your time and if you need anything, you just need to ask.
If you have any questions, do not hesitate to ask please.