Flicky (フリッキー) is an arcade game made by Sega. First released in arcades in 1984, Flicky was also released at the time for the SG-1000, and then ported to the MSX and Japanese computers Sharp X1, Fujitsu FM-7 and NEC PC-8801. It was later ported to the Sega Mega Drive/Genesis in 1991. Flicky was designed by Yoji Ishii, who was with Sonic Team until August 1999, when he formed Artoon, his own company.

Flicky Turncoat DX is a hack of Sonic 1 by GT Koopa. It has a top down art style similar to the 8-bit game Sonic Blast. The main idea of the game that, like the namesake, the small animals that Sonic used to save now hurt you. Luckily for the player, a shield now protects from the small animals, with the added ability of saving up said shields. Another quirk of the hack is that spikes kill you instantly, ala Megaman. Finally, there is an emerald monitor hidden within each act, requiring 50 rings to activate. The first zone, Pocky Field, is currently available to play.

Forgotten Worlds, originally titled Lost Worlds (Japanese: ロストワールド?) in Japan, is a side-scrolling shoot-'em-up game by Capcom originally released as a coin-operated video game in 1988. It is notable for being the first title released by Capcom for their CP System arcade game hardware.

Frogger is an arcade game introduced in 1981. It was developed by Konami, and licensed for worldwide distribution by Sega/Gremlin. The object of the game is to direct frogs to their homes one by one. To do this, each frog must avoid cars while crossing a busy road and navigate a river full of hazards. Skillful players may obtain some bonuses along the way. The game is regarded as a classic from the golden age of video arcade games and was noted for its novel gameplay and theme. It was also an early example of a game using more than one CPU, as it used two Z80 processors. Frogger is still popular and clones can be found on many Internet game sites. By 2005, Frogger had sold 20 million copies worldwide, including 5 million in the United States.

Gaiares (ガイアレス, Gaiaresu?) is a Japanese style side-scrolling space shooter released in 1990 by Telenet Japan for the Sega Mega Drive System and subsequently for its American counterpart, the Sega Genesis. Gaiares came into the video game scene at a time when this genre was immensely popular; competition was fierce with franchised games like Thunder Force II, R-Type and Gradius, so it had to distinguish itself with a unique weapon system. The name is supposedly a combination of Gaia (mother Earth) and a shortened form/abbreviation of the word "rescue" (Res), which is the main objective of the battle taking place within the storyline.

Gain Ground is a 1988 action-strategy arcade game later ported to the Sega Master System, Mega Drive/Genesis, and PC Engine (TurboGrafx-16). In 2004, it was re-released in Radica Games' TVPlay Legends Vol. II TV Games compilation. It was remade in the PlayStation 2 title Sega Ages 2500 Series Vol. 9: Gain Ground, which was released only in Japan. The Mega Drive/Genesis version was made available on the European and Australian Virtual Console on February 2, 2007, and was made available in North America on February 5, 2007. The game has also appeared on Sonic's Ultimate Genesis Collection for Xbox 360 and PlayStation 3. The game has also appeared on the Sega Genesis Collection on the PlayStation 2 and the PSP. On June 1, 2010 the game became available on Steam as part of the 'Sega Mega Drive Classics Pack'.