Progress Wars
progresswars.com
progresswars.com
I prefer my RPGs to be fire-and-forget, thank you very much.
It's pretty much the absolute minimal behaviorist game, one button and a variable reward schedule.
javascript:(function(){try{lvl=typeof(lvl)=='undefined'?document.cookie.split(' level=')[1].split(';')[0]:lvl;}catch(e){lvl=1;};setInterval(function(){lvl++;setLevel(lvl);document.cookie='level='+lvl;},1500);})();