6 and 20 looks like some zelda game, the eight one is on some 'online games' site (played it a few times, but i dont remember the name), no idea about the others
First Row 2nd: Ogre Battle: Knight of Lodis 3rd: Super Smash Brothers 5th: Zelda Ocarina of time 9th: Red Ninja ???
Second Row 2th: Some Final Fantasy game, 4th one ? 4th: Virtual Fighter ??? 5th: Castlevania ??? 8th-9th: Doki-Doki Majo Shinpan 10th: Another Zelda, Wind Walker ???
First Row *1st: Izuna? (certainly a roguelike) 2nd: Ogre Battle: Knight of Lodis 3rd: Super Smash Brothers 4th: *5th: Actraiser *6th: Zelda Ocarina of time *7th: Mr. Driller 8th: *9th: Tenchu 10th:
Second Row 1st: 2nd: Some Final Fantasy game, 4th one ? *3rd: City Connection 4th: Virtual Fighter ??? 5th: Castlevania ??? 6th: 7th: 8th-9th: Doki-Doki Majo Shinpan 10th: Windwaker
Top Row Left to Right: 1 - Furai No Shiren 3 2 - Tactics Ogre: Let Us Cling Together 3 - Super Smash Bros. Melee 4 - Sin and Punishment 5 - Act Raiser 6 - Legend of Zelda: Ocarina of Time 7 - Mr. Driller 8 - Strider 2 9 - Tenchu: Wrath of Heaven 10
Bottom Row Left to Right
1 2 3 - City Connection (Arcade) 4 - Fighting Cup (N64) 5 6 - Dancing Eyes 7 - Rolling Thunder (NES) 8,9 - (Based off Dokimajo) 10 - Legend of Zelda: The Wind Walker
Sources:
Wikipedia Google Image Search Hardcore Gaming 101 System16 Everyone before me ^_^
Legend of Zelda: Ocarina of TimeLegend of Zelda: The Wind WakerSuper Smash Bros.Mystery Dungeon: Shiren the WandererFighting CupStrider 2One of the SaGa gamesCity ConnectionDancing EyesWonder Project J2Rolling ThunderTenchuMr. DrillerDoki-Doki Majo ShinpanSin and PunishmentActraiserTactics OgreSuper Ghouls and Ghosts (SNES)