Need a kickass gamertag to intimidate the opposition in Call of Duty or Halo? Check out this list of over 60 cool gamer names for guys, girls. Looking for some fun, cool and unique virtual world avatar names? If you like to play virtual life games like IMVU, Second Life, SmallWorlds. Cool Nicknames to Use in the Online (or Offline) World sites and online games gave me the opportunity to create such a name for myself.