In order to keep up with the ever increasing ways to win in slots today, additional symbols are often added to help make winning combinations. Pyramid Plunder, for example, is a progressive slot with an Egyptian theme where a scarab beetle wraps around another symbol to include it. Some of these added symbols are the same symbol, expanded, while other extra symbols are shake and drop symbols that reveal a new set of symbols.
Other extra slot symbols sometimes include not only extra base game symbols but extra special symbols like extra wilds, not just one but more than one. This way jackpots grow and chances for winning in each spin increases.
Added scatters are very often included in certain slots as well and as most players know, scatters quite commonly trigger special bonus rounds. For slots that have bonus rounds, these rounds are much easier to hit with extra scatters on the reels. Gladiator slot by Playtech is an example of a casino game with an added scatter and bonus round in addition to wild symbols and a gamble feature and two different bonus games.
Expanding wilds are slot symbols that open up to cover an entire reel. Sometimes these wild occur in the base game or in a free spins round or in a bonus round. Expanding wilds always means more wins and with consecutive symbols in a row being turned into the same symbol, even if they are the same, more symbols forms more wins and substitute in for all other symbols along with other substitute symbols.