engine for Ultima VII (BG, FOV, SI, SS)

exult

engine for Ultima VII (BG, FOV, SI, SS)

Exult is an open source engine for playing Ultima VII on a variety of modern operating systems and environments. The Black Gate (including Forge of Virtue) and Serpent Isle (plus Silver Seed) are both playable to the end. Some differences to the original games exist; see sections 5.3/5.4 of the FAQ.
Content editor for use with OpenMW

openmw-cs

Content editor for use with OpenMW

OpenMW-CS is a content editor for OpenMW which gives full control of the game's content and the ability to create new content, games and mods.
open-source port of the DOS shoot-em-up Tyrian

opentyrian

open-source port of the DOS shoot-em-up Tyrian

Tyrian is an arcade-style vertical scrolling shooter. The story is set in 20,031 where you play as Trent Hawkins, a skilled fighter-pilot employed to fight Microsol and save the galaxy.
classic gothic/horror-themed first person shooter

quake

classic gothic/horror-themed first person shooter

Quake is a classic first-person shooter game by id Software, released in 1996. This package contains a launcher script and menu entry to play Quake with any suitable engine.
3D client framework for the WorldForge project

ember

3D client framework for the WorldForge project

Ember is a 3D client framework for WorldForge. It's not meant to be a standalone game, instead its purpose is to provide a solid and extensible base from which to build game-specific clients. One of the goals of Ember is to allow for easy customization of the codebase. Currently it supports the game world of Mason.
Atari 2600 Emulator for SDL & the X Window System

stella

Atari 2600 Emulator for SDL & the X Window System

Stella is a portable emulator of the old Atari 2600 video-game console. You can play most Atari 2600 games with it.