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When you take the east exit from Cyber City inDeltaruneChapter 2 and go north, you’ll come across a mouse cursor-shaped NPC calledHacker. He’ll give you the quest to find three blue checkmarks hidden all across the Cyber Field. Collecting all three of these checkmarks will unlock a secret later in the game related to the secret boss. This guide can help you find all the Blue Checkmarks in Chapter 2 ofDeltaruneand complete this side quest.
You can find the three blue checkmarks inDeltaruneChapter 2in any order. Just make sure you collect all of them and bring them back to the Hacker.

Deltarune Chapter 2 Blue Checkmark #1 Location
The first blue checkmark is hidden away from the main path. Here are all the steps you need to take to find it.
Deltarune Chapter 2 Blue Checkmark #2 Location
The second blue checkmark involves a bit of a puzzle and precision. Here’s how you can get this one:
Deltarune Chapter 2 Blue Checkmark #3 Location
The final checkmark requires another ride and a unique word puzzle. Here’s what you need to do:
With all three blue checkmarks in hand, make your way back to the Hacker in his secluded area. He’ll be thrilled and will reward you with some celebratory fireworks. More importantly, your efforts will make sure that the Hacker reappears later in the chapter and guide you in thesecret boss battle.