The game must have a zombified elephant throwing black holes at castles while riding as paper airplane and putting gems in towers. That is what the game would be. But I don't really see the need for a signature game.
I fail at using the BB Codes when tired. I also added a little more to this post. That above post can be deleted.
ArmorGames has many game excellent games and I don't think that one out of all of them could be a signature game on the site. A signature game that could match the sites theme would have to be something medieval and it has to be a spectacular game if it were to be considered to be a signature game, but still, I don't think that would happen. Maybe Armor Games should put all the highest played and rated games into a certain hall of fame section on the site and that could classify as their signature games, possibly.
i think that there are too many good games to have just one. a game of the day, which could be the most played or highest rated game for that day would be cool.
a game that detects your ag rank and presents playable characters based on what armatars you have unlocked. Ex: A wood surf would have all the basics but someone higher up might be a dragon