Are there any games like ROBLOX for Mac

Well, I can think of two... Minecraft, and another very fun game that I am completely addicted to called Blockland, Both Minecraft and Blockland have a free version to it...
Blockland's free trial
bad
1. no internet connection... you can't connect to the internet
2. all you can do is basicly make a server, and no one can join.. only you can play around and build random crap that comes to mind...
3. this go's with the demo and full game... if you don't get these cool things called "add-ons" you will be considered a noob... whatever that is...
Good
1. you can download these add-ons called "standred bot" and with that and a ton of eventing... you can make a whole server full of life-like robots that walk around... and even if you want them to, you can make them try and kill you and that's a crap load of fun as well as getting company from bots...
2. I like this so much and I think you should get it too.

Minecraft's free trial
Bad
1. there is no night time... and that means no fighting random monsters like zombies and creepers (which are exploding green penis-looking-things)...
2. its hard to play... you need to download a app, and even when you do download it it only works like one or two times a day...
3. its so stupid... because there is a end of every place you find... well, what i mean is there is alot of land, but after you get to this place, its just all water, and you cant get through it... and the ground is all the same height... and the water and lava is bad, and the lava doesent even kill you! So i am disapointed in that disign...
4. all you can do is build... its like the only thing you can do...
good
nothing is good about the demo of Minecraft...

but when you buy those games, they are a addicting bucket full of awesomeness....
but out of Minecraft and Blockland, I would buy Blockland, because its so better then Minecraft, and also because I bought Minecraft and I could not log in for months! MONTHS!!!
so I recomend Blockland other than Minecraft...