Microgaming casinos use to offer a free play bonus with no deposit require. Now they have changed to strictly offer deposit bonuses or a few selected give out spins. The free play bonus was popular for many players but due to everything going to mobile they were unable to intergrate it into the system. The last few that did give a free play, changed recently as they moved all their casinos to mobile. There is still the option to play the casino games for free in as a guest player or you can deposit where you will be topped off with extra cash. The free play online casinos were all powered by Microgaming allowing play on slots games, video poker, blackjack, plus a number of other casino games.
The online casinos have different ways to access the software. Of course there is mobile but you can play instantly from your desktop computer or download the software. Difference between them is the download version gives you all available games where as the other choices only gives you access to a limited amount.
Free Play Casinos - Play for Fun or Claim Deposit Bonus
If you have been playing the free mode casino games, at most of the casinos you can top offer your credits by going to the bank and adding more funs. Keep adding until you have enough credits to enjoy hours of play. If you deposit, you can always switch between fun version and the regular casino.