I have been trying for years off and on to unlock this challenger. Could someone tell me please which page do I refresh on. Is it the first page that has the lets play on it or do I continue past that page and refresh when I have the option to play the game. Even playing the game has not unlocked it.

According to the secret opponents guide it says: Randomly unlocked while playing Dark Matter Dice (Note: you can also refresh the game's main page until the challenger is unlocked)

https://subeta.net/games/dmd.php So either there or while playing the game randomly. I believe I got it from playing.

I'm pretty sure you can get it by refreshing on the main page for the game (from what people have told me), but it can take a lot of refreshing. I know some people who have gotten it over the past year or two who said it took like a few days of refreshing for a bit every day before they finally got it.

All I can say is that it should work eventually, it's just one of those stubborn RNG things that can take a while to finally show up.

It took me six months. I mean to get the unified matter Achivement, but since it took so long to unlock I still kinda hate the game so I haven't gone back.

Thank you I will keep trying

I finally unlocked him yesterday.

please lock.