A critical hit to your character's leg may cause that leg to be crippled. If one leg is crippled, it will cost more Action Points (AP) to move. One crippled leg also makes it impossible to run. If both legs are crippled, the AP cost to move is increased even more. Most characters, with average amounts of APs, will barely be able to move with two crippled legs. Naturally, having both legs crippled means you still cannot run. Non-combat walking speed is not affected, but this is pretty much a sham to protect your character from ruffians and other nogooddoers. Get to a doctor right quick! Well, as quick as your crippled character can...