The action RPG Underworld Ascendant [Official Site] from OtherSide Entertainment is now going to release on November 15th and they have a new trailer. They previously said it would be September, so hopefully the extra time will make it a better game.
Last we heard from them, they were still planning Linux support although they didn't have a specific date nailed down for the Linux version just yet, so do keep that in mind.
About the game:
From the creative minds behind the acclaimed Ultima Underworld® series, in Underworld Ascendant®, Paul Neurath and Warren Spector's OtherSide Entertainment is innovating upon the series’ signature player-authored gameplay forward in bold new ways.
Return to The Stygian Abyss in Underworld Ascendant®, the action RPG designed to encourage playstyle variety and choice. You are summoned by a mysterious figure to a breathtaking fantasy dungeon realm rife with danger and imperiled by the looming threat of the beast Typhon.
Follow it on Steam. When we have more information on the Linux release date we will let you know, as we are waiting on hearing back for the most up to date info.