You probably have some questions. Here are answers. 1. What is an emulator? It duplicates the function of one thing (i.e. Game Boy, Playstation, Sega Genesis) and allows it to be played on something else (i.e. Your iPod touch). Most of the emulators for the iPod touch are made by zodttd, which you can find at http://zodttd.com. 2. Where can I get one? You can get most emulators via the 'ZodTTD & MacCiti' source in Cydia. ScummVM is available from the Urban Fanatics' source, which you can install by tapping, "More Package Sources," on the featured tab of Cydia. NES is available from BigBoss, a community source. They are also all available via other package managers, such as RockApp. 3. What can I do with one? You can play your favorite video games that you never got to play as a child. Go, run child! Run! 4. Are they illegal? Emulators themselves are not illegal. Various portions of emulators are illegal, and are therefore not included in the original copy of the emulator. You must find these various files yourselves. The illegal parts are "BIOS" and "ROMS," which are described in greater detail below. 5. What is a BIOS file? In simple terms, a BIOS file is a "Built-In Operating System," meaning that it tells the emulator to run. The Emulator itself needs some instructions, and the BIOS will tell it how to run. BIOS files are illegal, so do not distribute them on this forum. They are illegal because they are an operating system. Think about if you copied Windows 95 install disks. Same thing. 6. What are ROMS? A "ROM" is a copy of a given console game. These "ROMS" can run on an emulator, and mostly are not legal. "ROMS" can be used to make copies of a game and easily spread to piracy. It is illegal to have a "ROM" for 24 hours, contrary to popular belief. However, some ROMS are legal. They are just crappy and are homemade. GameFAQs has more legal information for your enjoyment here. 7. What are the available emulators and what do they do? gpsPhone - Emulates Game Boy Advance (GBA). By ZodTTD. psx4iphone - Emulates Playstation (PSX). By ZodTTD. NES - Emulates the Nintendo Entertainment System (NES). By Jonathan Zdziarski. nes4iphone - Emulates the Nintendo Entertainment System (NES). By ZodTTD. gameboy4iphone - Emulates the Game Boy (GB) and Game Boy Color (GBC). By ZodTTD. snes4iphone - Emulates the Super Nintendo Entertainment System (SNES). By ZodTTD. genesis4iphone - Emulates the Sega Genesis. By ZodTTD. ScummVM - Emulates the Scumm point-and-click platform. By ZodTTD. n64iphone - Emulates the Nintendo 64 (N64). By ZodTTD. mame4iphone - Emulates the Multiple Arcade Machine Emulator (MAME). By ZodTTD. temper4iphone - Emulates the NEC Turbo Grafx 16. By ZodTTD. Mini vMac - Emulates early Mac OS versions. By Jesús A. Álvarez. 8. Where are ROMS supposed to go? gpsPhone - /var/mobile/Media/ROMs/GBA/. BIOS goes in the same place. psx4iphone - /var/mobile/Media/ROMs/PSX/ NES - /var/mobile/roms/NES nes4iphone - nes4iphone has an integrated ROM downloader. gameboy4iphone - /var/mobile/Media/ROMs/GBA/ snes4iphone - /var/mobile/Media/ROMs/SNES/. snes4iphone has an integrated ROM downloader. genesis4iphone - /var/mobile/Media/ROMs/GENESIS/ n64iphone - /var/mobile/Media/ROMs/N64/ mame4iphone - /var/mobile/Media/ROMs/MAME/roms/ temper4iphone - /var/mobile/Media/ROMs/TEMPER/ Mini vMac - ROMS: /var/mobile/Library/MacOSClassic. Disk images: /var/mobile/Library/MacOSClassic 9. What are the Possible Emulators? See the sticky above on possible emulators here. 10. What Emulators Run at Full Speed? This question can give you many different answers, especially on which "ROM" you're talking about. This is because some ROMS do not run perfectly, and some do. The most common answer for this is gpsPhone, gameboy4iphone, and NES. 11. Why is Sound Fuzzy? Sound often sounds rather imperfect in emulators because of the way emulation occurs. Without getting too technical, emulators are simply not the device they're emulating, and will therefore have some discrepancies in them. If you're too bothered by the fuzzy sound, simply don't listen to it.