Wildcards. One or more symbols may be designated as wildcards, meaning they can act like other symbols to make it easier to get winning combinations on a line. Typically, wildcards can be substituted for any other symbol except a "scatter" symbol. When wildcards combine with different types of symbols in a line to make two or more possible paying combinations, the symbol with the highest payout will prevail.

Space Ace:		Supernova is wildcard (except with Alien)
Faerie Tale:		Faerie Gold is wildcard (except with Faerie Sprites and Magic Door)
Eureka!:		Eureka is wildcard (except with Doubler and Frankster)
Cactus Jack:		Money Bag and Horseshoe symbols are wild
Jurassic Cash:		Volcano symbols are wild

Bonus Rounds. Some symbol combinations may award a bonus round where the player gets to pick some number of set of hidden prizes. The player is guaranteed some minimum prize, but the winnings may be much higher depending on which prizes are picked.

Space Ace:		9 hidden prizes worth from 5 to 45 coins each. Get 4 Starships, pick 1 prize (pays 5 to 45 coins). Get 5 Starships, pick 2 prizes (pays 10 to 90 coins).
Faerie Tale:		Get 3 Doors and pick 1 of 3 hidden door prizes Get 4 Doors and win the door prize x5 Get 5 Doors and win the door prize x10!
Cactus Jack:		Get 5 of any poker symbol and pick up to 5 of 15 hidden prizes

Scatter Symbols. Normally, a combination of symbols has to be all within a single line in order to win a prize. A Scatter Symbol is different in that it can be scattered across all lines and still constitute a winning combination. Since Scatter Symbols are not constrained to a single line, it is much easier to score a winning combination. In most cases, a Scatter Symbol combination is not even constrained to only appearing in any active line, but can be scattered among all lines, whether active or not.

Space Ace:		Alien is a scatter symbol and can appear in any line.
Faerie Tale:		Faerie Sprites are a scatter symbol and can appear in any line.
Eureka!:		Frankster is a scatter symbol and can appear in any line.
Cactus Jack:		Horseshoe is a scatter symbol and can appear in any line.
Jurassic Cash:		Egg is a scatter symbol and can appear in any line.

Free Spins. Some symbol combinations may award a number of Free Spins where the game will be repeated free of charge with no credits deducted for each spin. During Free Spins, prizes (except for Progressive Jackpots) may be doubled or otherwise increased, but only those lines that were active at the time the Free Spin was awarded will be eligible for payouts. To guarantee at least a minimum prize, a Free Spin award may include a Bounty Payout of a certain number credits per active line.

Space Ace:		Get 5 or more Scatter Symbols (Alien) anywhere among all lines and win 10 coins per active line plus 15 Free Spins with double prizes (except jackpot).
Faerie Tale:		Get 3 or more Scatter Symbols (Faerie Sprites) anywhere among all lines and win 5-20 Free Spins.
Eureka!:		Get 2 or more Scatter Symbols (Frankster) anywhere and win up to 25 free spins and a 500x bonus!
Cactus Jack:		Get 3 or more Scatter Symbols (Horseshoes) anywhere and win 15 free spins with triple payouts and up to a 25x bounty!
Jurassic Cash:		Get 3 or more Scatter Symbols (Eggs) anywhere among all lines and win 15-25 Free Spins.

Note that a set of Free Spins might result in Bonus Rounds if the right combination comes up during a free spin. When that happens the Bonus Round prizes are doubled.

During a set of Free Spins, there is also a possibility that you might get another 5 scatter symbols on one of the free spins and thus win another 15 Free Spins! In that case the additional free spins are played as soon as the first set of free spins has completed. Prizes in the second set of Free Spins are doubled as in the first set, but this doubling is not compounded (in other words, it is not a doubling of the double prizes).