so i’ve seen the subject of implementing stealth and sneaking into the game come up from time to time, and how it could be done. well, i have discovered a game called Unreal World, which has it pretty well.
http://z3.invisionfree.com/UrW_forum/index.php?act=idx
http://www.unrealworld.fi/
in UrW you can only face one direction at a time, and you do 1&1/8th turns using 4 & 6 on the keypad, 1&1/4th turns with 7 & 9, and about faces using 1 & 3. creatures and people have a little facing arrow next to them that shows which direction they’re facing, and you use the stealth skill to move around unseen, with a higher level decreasing the distance from which you can be seen while sneaking.
i think it would be reasonably simple to implement something like this in CDDA