Activision Anthology is a compilation of most of the Atari 2600 games by Activision for various systems. It also includes some games originally released by Absolute Entertainment and Imagic, as well as some homebrewed games. The Windows and Mac OS X versions are titled Activision Anthology Remix, and include the most games. The PlayStation Portable version is entitled Activision Hits: Remixed. The game features the original classical gameplay of the Atari 2600 emulated on modern machines, however after achieving high scores in some of the games, the player can unlock special modes, where the colors are distorted, or the game is projected on a rotating cube as added difficulty. The Anthology features a virtual tape deck with several licensed 80s music tracks. The sound of the virtual tape recorder can be mixed with the original game sound, so both sounds are hearable to simulate playing the game on TV while having the tape running in the background. The Anthology features a virtual kid's room as a main menu. The player zooms to several viewpoints to check highscores, choose a game from a rotating stand, change the background music on the virtual tape deck, or change game settings while being zoomed in on the virtual VCS 2600. Six Activision-produced Atari 2600 titles were not included in Activision Anthology, likely due to outside ownership of their respective licenses. The excluded games are Double Dragon, Ghostbusters, Ghostbusters II, Kung Fu Master, Rampage, and Commando, though Capcom did give Activision rights to put Commando on the PlayStation 2 version of Activision Anthology. Ghostbusters II was cancelled before Activision could release it, but Salu released it in Europe under their name in 1992. As well, the Absolute Entertainment title Pete Rose Baseball was renamed Baseball, presumably due to licensing rights to Pete Rose's name.

Advance Guardian Heroes (アドバンスガーディアンヒーローズ) is a beat 'em up videogame developed by Treasure for the Game Boy Advance. The game was released September 22, 2004 in Japan, September 14, 2004 in North America and February 18, 2005 in Europe. The American and European editions of the game are published by Ubisoft. The game is a sequel to Sega Saturn's Guardian Heroes. Since Sega is the original copyright holder and wasn't interested in assuming the production of a sequel, Treasure had to license the intellectual property from Sega in order to carry out the game themselves.