Yes. You can try many games without depositing by using fun mode. In this mode you play with a test balance: no money is taken from your account and you do not win real money either.
To use it:
Open the game you want to try.
In the game bar, turn on the fun play option.
If you want to play with your balance, switch to real play.
Not every game has fun mode: it depends on the game and the provider.
To play with real money you need a balance in your account. You can deposit from Wallet.