Revenge Titles in Undead Knights are achievements that players can accomplish by fulfilling specific conditions in battle. Some of them are easy to achieve while others take more time and effort to attain.
| Title | Requirements | |
|---|---|---|
| Undead Master | アンデッド使い | Create 100 undead. |
| Undead Leader | アンデッドの頭 | Create 500 undead. |
| Undead General | アンデッド軍団長 | Create 1,000 undead. |
| Undead Prez | アンデッド大統領 | Create 3,000 undead. |
| Knaughty Knight | ちょいわる騎士 | Take the lives of 50 enemies. |
| Fallen Knight | 悪徳騎士 | Take the lives of 200 enemies. |
| Brutal Knight | 残虐騎士 | Take the lives of 1,000 enemies. |
| Infernal Badass | 極悪非道騎士 | Take the lives of 3,000 enemies. |
| Master Tosser | なげっぱなし名人 | Throw 100 undead. |
| Champion Hurler | なげっぱなし超人 | Throw 500 undead. |
| Zombie Squisher | ゾンビつぶし | Slam 100 undead into the ground. |
| Zombie Splatter | ゾンビ破壊王 | Slam 500 undead into the ground. |
| Tenacious Z | ど根性ゾンビ | Bring down 30 gates. |
| World's Greatest Boss | 偉大なるご主人様 | Perform all undead gimmicks. |
| Zombie Builder | ゾンビ設計者 | Create 10 undead bridges. |
| Zombie Architect | ゾンビ総監督 | Create 50 undead bridges. |
| Pain in the Ass | 地獄の大暴君 | Give undead 200 impossible orders. |
| Wrecking Crew | 解体の達人 | Destroy 200 archer blinds. |
| Bulldozer | 街道の掃除屋 | Destroy 100 fences. |
| Lord of Destruction | 荒くれクラッシャー | Destroy 500 obstacles. |
| Tiny's My Bitch | 巨人の飼い主 | Turn one Executioner undead. |
| The Big Boss | 巨人兵団長 | Turn 20 Executioners undead. |
| Heavy Metal | 鉄巨人の僕 | Turn one Dreadnought undead. |
| Death Metal | 鉄騎兵団長 | Turn 20 Dreadnoughts undead. |
| Crazy Circus of Doom | 巨人サーカス団長 | Turn 100 Executioners and Dreadnoughts undead. |
| Snake in the Grass | 蛇使い | Turn one Ouroboros undead. |
| Snake Charmer | スネーク・マエストロ | Turn 50 Ouroboros undead. |
| Boom Goes the Dynamite | 恐るべき爆弾魔 | Create 100 bomb undead. |
| Bloodsucker | 吸血君主 | Perform 1,000 critical zombie impacts. |
| Fleeting Vengeance | 仮初の復讐者 | Clear all chapters with Romulus on Easy. |
| Eternal Vengeance | 永遠の復讐者 | Clear all chapters with Romulus on Normal. |
| Give 'Em Hell | 究極の復讐者 | Clear all chapters with Romulus on Hell. |
| Unfinished War | 未完の戦い | Clear all chapters with Remus on Easy. |
| Undying War | 不死の戦い | Clear all chapters with Remus on Normal. |
| Kiss My Ass | 不死の戦神 | Clear all chapters with Remus on Hell. |
| False Redemption | 偽りの贖罪 | Clear all chapters with Sylvia on Easy. |
| Vow of Atonement | 贖罪の誓い | Clear all chapters with Sylvia on Normal. |
| Nobody's Bitch | 永久の贖罪 | Clear all chapters with Sylvia on Hell. |
| Filthy Rich | 大富豪 | Collect the maximum amount of dark energy. |
| Evil Player | 暗黒の遊び人 | Accumulate over 50 hours of play time. |
| The Player from Hell | 地獄の遊び人 | Accumulate over 100 hours of play time. |
| Cutting Edge | 武器収集家 | Collect all special weapons. |
| Dead Sexy | 買い物の達人 | Purchase all items for customization. |
| Infernal Conqueror | 地獄の覇者 | Clear all chapters with an "S" rank. |
| Obsessive Vengeance | 果てしなき復讐者 | Clear 100 chapters after completing the game. |
| Natural Born Killer | 道楽殺人鬼 | Take the lives of 300 enemies in one chapter. |
| Regicide | キングハンター | Kill 100 bosses. |