Expendabros - Expendabros is an epic amalgamation of all the wonderful elements such as Action, Run and Gun, Side-Scrolling and Platform etc.
Dungeons of Dredmor - Dungeons of Dredmor by Gaslamp Games
Mark of the Ninja - Mark of the Ninja is a fast-paced Action-Adventure, Side-Scrolling, Platform and Sword fighting video game that lets you be a skilled Ninja who embarks on an epic journey to defeat the enemies who attacked on his DOJO.
NetHack - NetHack is a single player dungeon exploration game that runs on a wide variety of computer...
Metal Slug - The definitive, side-scrolling bullet hell platformer.
Shattered Pixel Dungeon - A Roguelike RPG, with randomly generated levels, items, enemies, and traps!