
It is officially too late to ask how to access the Hades 2 technical test. Developer Supergiant Games says it's planning "to start winding down the test on Monday [April 29]," but there's unambiguously good news to go with that. The roguelike sequel's full early access launch is planned to arrive "relatively soon after that," meaning everyone will get a chance to play the game and technical test participants will get access to a bigger, more polished experience.
I'm assuming that "winding down" the technical test means that access to the current playable build will be entirely revoked come April 29. At exactly what time, and whether it will roll out in waves or for the whole player base all at once, remains to be seen.