Last month Oculus was ordered to pay $500 million to ZeniMax for violating a non-disclosure agreement, copyright infringement, and false designation (claiming to build something that it didn’t). Oculus is currently appealing the judgement.

Now Oculus CTO and former ZeniMax employee John Carmack has added a personal lawsuit to the mix. He’s suing ZeniMax for $22.5 million, which he claims is the last outstanding payment from his sale of id Software in 2009, which ZeniMax purchased for $150 million.

Carmack’s share of that sale was $45 million. He converted half of it into ZeniMax shares in 2011, but says he hasn’t received the rest of it despite asking nicely. The lawsuit is a little spicy, stating, “Sour grapes is not an affirmative…

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