This achievement is story-related and can't be missed.It is unlocked on the rewards screen, after completing Stage 5, "Hydra Hijinks".
General notes:
- If you plan on completing the game, you'll need to play this level twice, both on Story Mode and on Freeplay;
- If you're playing co-op, both players should have it unlocked after completing the stage;
- If it glitches and doesn't unlock for you, it should unlock properly if you beat the stage again, either on Story Mode or on Freeplay.
For a detailed walkthrough, check this guide by IGN:
https://www.ign.com/wikis/lego-marvel-super-heroes-2/Hydra_H...