There was a game I played once and cannot remember the name of it:
2D platform. little guy running around, black and white. you had to get to some point, but there are couple guards patrolling around, if one of them notices you, there was some 'alarm' and they looked for you. I think you had a skill for increase your speed for couple sec, and maybe to be invisible? many levels. played couple years ago.
anyone, please?