Tales of Vesperia

You need to achieve a 100-hit combo or greater to unlock this.

The same strategy that works for "Rita Grade Farming" will also work to unlock this achievement.

To recap that, Rita will need the skills Minimum Damage, Spell End, OL Boost, and have the Wonder Symbol equipped. Have the Taunt and Taunt 2 skills equipped on the other 3 characters and set them to defend only. Then, simply go into Overlimit 3 and continuously spam tidal wave. By the time OL runs out, you should have enough to active OL 3 again and continue this indefinitely.

The video below begins in mid fight with a combo that is already over 800.

An alternate way to do this rather than BLAH BLAH BLAH TIDAL WAVE is to use Yuri's Brutal Fang. Get Yuri to level 41, set the arte as your neutral A (LS not needed) and, if you can at Part 2 (I would expect someone to be at Part 2 at Lv. 41) obtain and equip the skills High, Hyper, and Ultimate Tension through the Tyrant Fist gloves for Yuri. (Obtained through synthesizing) These allow you to go into Overlimit 1 with a 28 hit combo, overlimit 2 with a 50-hit combo, and overlimit 3 with a 72-hit combo, respectively. (This will only have half the duration of normal overlimit) Use Brutal Fang for at least 100 times before doing this to obtain 27 total hits (Extra punches can be thrown with the B button at the right timing, or you can just mash and be lucky) I also recommend the Special and Hit Plus skills to use Yuri's mystic arte and obtain extra hits with hit plus. Now, set everyone to manual through their artes menu. Then, find a low level enemy, best place being around Zaphias, and do this combo: B, B, B, A, (Brutal Fang) time or mash B to get to 28 hits, then do normal attacks and Brutal fang AND B mash for extra hits to achieve 50 hits, then do the same thing until 72 hits, and just Brutal Fang and HOLD B for Savage Wolf Fury. Mash B after Yuri's quote for extra hits and then 20G for you after 100 hits. Just be wary of your overlimit gauge as you have half of normal overlimit,