The following are quotes from Simutronic's Player Docs (you have downloaded them, right?)

"Rogues are a cavalier lot. A lot of people call them thieves, but there is a lot more to them than that. They are masters of stealth and acrobatic moves and specialize in mechanical skills like picking locks."

"Rogues are the survivalists of the streets. They are handy at getting out of sticky situations and are expert fighters (though not quite as good as a Warrior). Their skills in stealth and perception allow them to remain unseen and then ambush their enemies at the best possible moment. Rogues generally do better by avoiding any kind of armor and relying on their superb acrobatic and evasive skills for defense."

So, what can you expect from your adventure as a Rogue? The following is a quote from in game Help Rogue:
"While certainly no slouch in direct hand-to-hand combat, the rogue usually prefers the more subtle approach. Using his or her skills in stealth and perception, the rogue can remain unseen and then ambush at the best possible time. Unlike the warrior, the rogue generally prefers to avoid wearing armor in reverence to his or her superb acrobatic and evasion skills."

CREATING YOUR CHARACTER
YOUR DEITY'S SENSE OF HUMOR
ON THE STREETS, IN THE SHADOWS
ROLEPLAYING
LOCKS AND OTHER WONDERS
HUNTING
ADVANCING