Spending real money to play a game of chance for a reward.
"The game has a gacha system which you can exchange "Lunacy" to get characters of three different rarities, with the higher rarities having a smaller chance to obtain."
"You can spend real life money to purchase "Darwinium" the in game currency, which can then be used to buy various loot crate style boxes containing upgrades. Although you don't have to, it's possible to play the game entirely without this."
"you can buy boosters that are guarenteed to drop random legendaries but theres no guarenteed youll get the one you want and there is no dupe prevention"
"You get a chance to spin the wheel to earn stars. To keep spinning, you need to watch an ad."
"Every clothe you can buy for your character is obtain with a sort of loot box system, and the chances to get a valuable item is very rare. Also, every 10th trial or so, you're granted with a chance to get a better item."
"Sort of. Tickets can be purchased to play minigames, which output random rewards. These tickets can be acquired through gameplay as well."
"To a certain extent - you can spend money on the in-game currency of "gems" and then sometimes spend gems on chests that may give you more in-game currency"