8-Legged
CMU Dante, Crab Mechamo, Gimlee-U8, K2T, Lobster [sim], Nichols, OCT-1c, Robug III [1] [2], Scorpion [1] [2], Scuttle [1] [2], Cyber Spider, LegoSpider, geared spider [1] [2], Ziegler

6-Legged
Alio, Ambler, Argos, Battlebugs, Boris [huge], Botic, Micro-Cricket, Falstaff, Fourmika, Fuzzknuckles, Hannibal, Hexplorer, JPL 6-legged "spider", Lemur, Mamby, Max, Melanie, Mhex, Milquetoast, Minne, H.Monster, Nonaped, RHex, Robot II, Robobug, Rodney, ServoBot, Sprawlita, Symapod, Tarry, Timberjack, YoshiTank, Ziggy

4-Legged
Arachnobot, Aramies, Banryu dragon [1] [2] [3], Beast, Bennett, BigDog, Bisam, Cat Project, Conro, Dino, Jrob, LittleDog [1] [2], Nico, Nico-II, NN-Walker, Pucho, RunningDog, RoboCat, RoQ1, ScottBot, Scout-I, Scout-II, Silo4, SQ43, Thing, TomCat, Turtle, Wall-climber, Whegs, Wistort.Dog

2-Legged
2L1v6, 43 Projects, AIST-Japan, Baps [Delft], ED-209, EyeBot, Havinga, Knewt, Lucy, M2, Mechadon, Pinky, Rabbit [1] [2], RB9, Sony, Spong, Mrs Stampy, Topaz, Toshi.Doi, Troody [1] [2] [3], WilbyWalker, V3