Precisely, in this 9-line slot the wild symbol is the same special symbol in charge of triggering the free spin round, and just like in some Merkur slots, once you have triggered the feature you pass to a screen where one of the regular symbols is converted into a special symbol by means of a random selection, then this special symbol will expand throughout the reel whenever it appears if there are enough of them to form a line regardless of whether those symbols are on adjacent reels or not.
In this game it seems that the symbol that has been designated as special symbol, it decreases its volume of activity during free spins; but this round is something I really cannot complain about as it happens quite often, and in some cases it led me to get big wins between 40x and 44x my total bet, and although other times this round was not so profitable; however, I really think it's a good feature because of that dynamism.
During the base game, the story is somewhat different since although the wild symbol is quite active and paytable’s prices are quite decent, the low number of lines usually causes that in this stage of the game, normally money spent in bets, it is greater than money received from hits.
In any case, this has seemed a pretty appropriate slot to use in the task of clearing some type of bonus since our balance seems to remain most of the time very close to the starting point; on the other hand, it does not seem to be the right slot if you're aiming to make big bucks quickly.
In my debut, I did not lose or win money playing “Trojan Horse” slot, but instead, I think I had good time betting on it and all with a minimum of stress.