[Varyon]

It was a video game, but the skill levels could have worked in a tabletop game as well - Elder Scrolls IV: Oblivion had skills that, in addition to gradually increasing in effectiveness as your skill increased, gave special benefits at sufficiently-high levels. For example, with Marksman (the skill for using a bow and arrow; because a hit is determined by player skill, it serves to influence how much damage you do with a bow), skill 25+ meant you no longer lost fatigue when holding a bow drawn, skill 50+ gave you the ability to zoom in when aiming a bow, skill 75+ meant you had a chance of knocking down any foe you hit with an arrow (which also had a knockback effect, useful for keeping melee foes at bay), and skill 100 (the maximum) meant you had a chance of paralyzing any foe you hit with an arrow (basically just a knockback that lasted a bit longer). Meanwhile, for Light Armor (higher skill makes the armor more protective - that is, you take less damage when hit), skill 25+ and 50+ meant the armor's durability was lost at a reduced rate (2/3rds default at 25+, 1/3rd default at 50+), skill 75+ meant that worn light armor didn't count toward your encumbrance, and skill 100 meant armor had a 50% bonus if you were wearing only light armor, making the armor roughly as protective as equivalent heavy armor.