3D Realms has rereleased a bunch of games they originally released under their former name Apogee Software. All games are free and they’re being released with source code (under GPL).

Here are the list of games and their download link.

• Kroz - Our first ever game, a text adventure game by Scott Miller [ download ]
• Arctic Adventure - a CGA based scroller game by George Broussard [ download ]
• Dark Ages - an EGA based scroller game by Todd Replogle [ download ]
• Monuments of Mars - a CGA based scroller by Todd Replogle [ download ]
• Pharaoh’s Tomb - a CGA based scroller game by George Broussad [ download ]

They are also re-releasing some previously released freeware games.

• Beyond the Titanic - Text based Infocom style adventure game by Scott Miller [ download ]
• Supernova - Text based Infocom style adventure game by Scott Miller [ download ]
• Word Whiz - A text based trivia game from Scott Miller [ download ]

Source: 3D Realms