Batman: Return to Arkham - Arkham City

You can select the very first combat challenge for this trophy, which is the easiest given its low enemy count. Evasion and effective countering is key here, skills you should have built over the course of completing the game and Riddler’s Revenge. Note that you can select any of Batman, Catwoman, Robin or Nightwing for this trophy, so if you feel more competent with another character, you can use them instead.

Alternatively, you can exploit modifiers in custom challenges to make this very easy, using Batman as the playable character. In the Custom Challenges menu, select any map and use the Takedown Projectiles modifier. With this modifier, enemies are taken down with projectiles, including quickfire batarangs. This trophy becomes a matter of repeatedly pressing for the 4 rounds.

The trophy will unlock as soon as you meet its requirements.