Action-RPG

Diablo is an action role-playing video game developed by Blizzard North and released by Blizzard Entertainment in January 1997.

This game is an action RPG set in space. Combat is real time with the ability to pause the action and strategize à la KOTOR.
Downloadable content will be available from Bioware for this PC version.

Alien interaction time.

a free-to-play nautical MMORPG developed by Snail Games and published by IGG.

This game is an action RPG with a top-down perspective. Players can recruit additional NPCs to expand the size of their party. Character development is based upon skill points which allows for customization of abilities. Take Dungeon Siege. Take Diablo II. Mix together. Serve chilled.

Avencast is an RPG developed by ClockStone Software.Players control a youth with a mysterious past who has been blessed with extraordinary magical abilities and natural talent. Basically you are the anti-Willow.Character development is accomplished through the tried and true point system. Stats and spells. Take your pick. Stockpile your array of pretty, pyrotechnic spells and get slaying.

Players control a large party of characters as they fight their way through a seamless environment. Characters develop their abilities by using a particular class of weapon or magic. Players can customize their characters to suit their playing style. Slash, burn, kill, loot. Rinse and repeat.

Hellgate: London is the new third-person action game from the creators of the original Diablo. It is seen as a spiritual successor to the "just one more click" loot dropping mouse killer that was Diablo.

Tilt the floor to roll a ball through an obstacle course before time runs out. Neverball is part puzzle game, part action game, and entirely a test of skill.
Also found here is Neverputt, a hot-seat multiplayer miniature golf game using the physics and graphics of Neverball.

Neverball and Neverputt are known to run under Linux, Win2K/XP, FreeBSD, and OSX. Hardware accelerated OpenGL is required. A 500MHz processor is recommended.
Download Free here: http://icculus.org/neverball/

Morrowind is the third installment of the Elder Scrolls series by Bethesda. Players select a character from an array of races and seek their destiny on the harsh landscape of the island Morrowind. This is an expansive RPG with a large world for characters to explore at their whim. Character development is based on developing skills and their corresponding attributes. This is the first Elder Scrolls game to utilize the plugin system which allows community created content to be added to the game.

Players control a party of up to four characters. Battles can be fought with melee combat in third-person perspective or a ranged first-person perspective. As characters gain experience they can increase their stats and learn additional abilities. Weapons and armors can be customized with additional attributes that can further tailor characters. Escort the princess and keep her from busting out of her garb.