Board Thread:Questions and Answers/@comment-86.182.151.242-20131113002038/@comment-15636815-20131113034530

Actually, Daniel, the limits help keep the game challenging, and therefore fun.

The game has limits for a few reasons.


 * 1) The game places limits on certain locomotives, wagons, and buildings to prevent players from becoming overpowered.  For example, the game's first non-gems loco with a limit is NSB Class XXI, a steam engine with power 7 and limit 1.  This loco is available at level 17, although 7 power steamers become unlimited at level 30.  If you could have unlimited level 30 locos at level 17, there'd be no reason for you to buy any other type of loco until you got above level 30.  You'd go through the achievements more quickly than the game is designed to handle, and you'd probably stop having fun.
 * 2) Then why let you have locos early at all? Why not just keep every loco at its level and make them all unlimited. Well, because it's fun! It's kind of cool to have access to a loco that's more powerful than the rest of your fleet, even if you can have only one. It can become a sort of "flagship" for some players.
 * 3) Pixel Federation enjoys providing the game to people who want to play for free, and they have promised that no one ever will have to buy gems to play or advance. Just the same, they'd like to sell some gem locos, and maybe even sell some gems. If they let people skip 13 levels' worth of locos, they'd cut into their own profit.
 * 4) Finally, some locos are limited just because they're special. They're supposed to be unique--in your fleet, anyway. The National Flag Engines are a perfect example.

If you have more questions, let us know.