This is for those of you who, like me, can surf from work or don't have hours upon hours to play games.
I recently started playing 2 web based mmo games (1 rpg & 1 space simulation). Both are free to play and require no software to be installed on your PC.
Fallen Sword -
http://www.fallensword.com/?ref=1081656
This is a RPG where you can explore / Quest / PVP. If Diablo was a web based game, this would be it! The itemisation is very well done: tons of gear / sets and ways to improve the quality of items. As for NPC, you have regular / Champion / Elite / Legendary / Super Elite that you can come across, but you need to group up in order to defeat the stronger types.
Joining a guild is strongly encouraged and will help you gain xp and gear.
OGame -
OGame.org
This is a space simulation with over 4,000 systems to explore / colonize. Here you start a colony, build mines and utility buildings in order to build a fleet and expand your empire. This game reminds me of EVE-Online, only web based.
Check these out and contact me if you need any help getting started!
-Suby