The caged alien is the wild symbol, it can substitute for all of the other symbols, except for the scatter and bonus symbols, to help and form winning combinations.
The scatter symbol is the alien hunter in his spaceship. There is also an alien egg bonus symbol and a second bonus symbol featuring the alien hunter.
When three, four or five of the spaceship symbols land anywhere on the reels you will be rewarded with five, ten or twenty-five free spins respectively. Furthermore, it is possible to retrigger the spins by landing more scatters.
When the alien egg symbol lands on reels one and five simultaneously the Alien Egg Bonus begins. You need to pick from the eggs displayed on the screen and they will award you cash prizes and if you find the Super-Egg it will double all of your wins. You can win up to 720 coins but the round will end when you find the bad ‘head jumper’ alien.
The Spaceman Bonus begins when three spaceman symbols land on an active payline across the middle three reels. You then have the choice between two bonus games, a Skill Game and a Luck Game. In the Skill Game you need to click on six aliens within fifteen seconds in order to win money. The aliens are worth different amounts depending upon their colour, red are the most valuable, followed by blue and then green. The faster you catch them, the more you will win. In the luck game, you need to do the same but the prize is randomly calculated and there is no time limit.
To make things even more exciting you can opt into the Dollar Ball progressive jackpot game as you play. To opt in simply click on the ‘Enable’ button above the reels. You then need to pick five numbers between 1 and 49 and with each spin of the reels a lottery style draw will take place. If you match all five numbers then the jackpot is yours. Matching four numbers wins you 1% of the jackpot while matching one, two or three numbers wins you a fixed payout of 1x, 2x and 25x respectively.
There is a huge top payout of 10,000x up for grabs if you land five wilds across a payline. The yellow alien offers payouts of up to 1,000x, the green alien offers payouts of up to 500x and the purple alien offers payouts of up to 200x.