Fight City is a strategy card game in which each player needs his own deck. Each player's deck is composed of 50-60 cards, like Locations, Fighters, Weapons and Events. Players take turns bringing cards into play and using their cards to fight. The object of the game is to run your opponent out of money.
Did you think to put your Fight City cards in standard card sleeves? And then what? Where do you put them now? The original box will not be able to hold them anymore so this are two boxes (one for each deck) to carry this game around, while the cards are well protected inside those sleeves.
Just print this PDF and cut along the edges and use double sided tape (I worked this is to be the best method but YMMV) to put them all together.