These two shirts, from BROKENTIER, are part of a collaboration honouring IFC Yipes, one of the fighting game scene's most prominent characters, who is not only a handy gamer himself but also hosts and infamously commentates matches as well.
That clip linked above? That's Yipes on the mic. Hence these shirts.
They're $US28 each, which is a little higher than you'd normally pay for a t-shirt. But how many of your normal shirts have a Mango Sentinel on them?
[BROKENTIER, thanks Doug!]