Betrayer? They added the colour slider because of complaints. Though I don't remember if it resoloved the red-colourblind issues Betrayer had...
Seems OK for me.
Their launcher sucks. It uses bitraider (essentially, a peer-to-peer torrent/download manager-style thing) for updates which puts it in my bad book, especially since it installs without a user's knowledge or consent and is in general always a little slower than it should be, just like the game itself. Bitraider can cause people to have wonky/slow downloads that direct downloads will avoid, with the sole benefit of playing while downloading.
Unfortunately, disabling bitraider (
guide) requires redownloading the entire game.