This article will be about the browser games that give quite a bit, and don't take to long!
1. Divine Storm
This MMO isn't what I would call good, but it's relatively easy! You have to get to level 45 to get 240 gems, which takes around an hour. This one has TONS of quests, and I didn't find myself as bored as I thought I would be. You have to destroy all the darkness, and evil. There's 3 different classes to choose from, and there's male and female. You get to enjoy slaying your enemies with these epic skills you earn. Once you start getting more powerfull, you start to go against bosses. You can get pets, rides, and even wings to make your character look cool. Explore, and get tons of items, gear, and swords. Create groups, and invite your friends, or join a group and have loads of fun.
2. SAO Legend
Like the last, this game isn't as expected, and isn't what I call good. It takes around the same time (an hour or more) to get to the required level, which is 30. It gives 260, more than Divine Storm. This one's based off of an anime SAO, and it has a story to tell. It tells a story of a boy trapped in a VR universe, and he has to fight his way to the top in order to escape. Here you will have to be brave, and skillful in order to beat the game. It offers tons of quest, and loads of fun. Defend your allies, and your close ones. As you will not want to watch them go.
3. Throne: Kingdom at War
I wouldn't necessarily say this one's easy, but the prize on it is quite good! Around 2 hours, or less for 695 gems. Now isn't that worth it? This game is an MMORPG based around becoming a lord in Throne. You will have to challenge yourself to prove that you're worth it to be the powerful leader. The path you take to success is your choice with multiple things to choose from. You can make allies, and befriend some people, or you can make enemies. You have to make a powerful town, which will take tons of upgrading, and resources. Become the one and only, battle, win.
That's the end of this article, hope it helped, and enjoy!