If you wax nostalgic for some of the old days of gaming, then you might want to take a peek at this emulator for Android called RetroArch. It includes a smorgasbord of emulation possibilities for some great past gaming devices/systems. Here's a list:

RetroArch Plays the following kind of games:
- PlayStation 1 (emulator: PCSX ReARMed)
- Super Nintendo (emulator: SNES9x Next)
- Nintendo Entertainment System (emulator: FCEUmm / NEStopia / QuickNES)
- GameBoy / GameBoy Color (emulator: Gambatte)
- GameBoy Advance (emulator: VBA Next) (*)
- Arcade (emulator: Final Burn Alpha)
- Neo Geo Pocket Color (emulator: Mednafen NGP)
- Virtual Boy (emulator: Mednafen VB)
- Sega Genesis/Mega Drive (emulator: Genesis Plus GX)
- Sega Master System/Sega Game Gear (emulator: Genesis Plus GX)
- Sega CD / Mega CD (emulator: Genesis Plus GX)
- PC Engine / PC Engine CD (emulator: Mednafen PCE Fast)
- WonderSwan Color / Crystal (emulator: Mednafen Wonderswan)
- Cave Story (game engine: NX Engine)
- Doom 1 / Doom 2 / Ultimate Doom / Final Doom (game engine: prBoom)
- Quake 1 / Quake 1 Mission Packs 1 and 2 (game engine: Tyrquake)
What do you guys think? Is it worth checking out for a small chance to relive some of your old favorites? Also, if you are aware of other game emulator alternatives for Android, share them in this thread.

Thanks to rakumiazuri for the tip!

Source: Google Play Store - RetroArch