How to unlock The Sentinel
Clear Castle x Ramparts
Complete the base game and install Risen Ballbylon to access the DLC biomes. Clear Castle x Ramparts to unlock the Guard House blueprint.
Gather 50 Wood + 100 Crystal
For Guard House, gather 50 Wood and 100 Crystal. Crystal is gathered with the Crystal Monolith and Crystal Cavern buildings.
The Sentinel unlock requirements Requirement Target Clear biome Castle x Ramparts Build blueprint Guard House Building cost 50 Wood + 100 Crystal Build Guard House at your base
Return to base, construct Guard House, and send harvesters to work on it. The biome clear unlocks the blueprint; completing the building unlocks The Sentinel.
What success looks like
The Sentinel is available in the character roster after Guard House is completed.
Ability and aiming
The Sentinel can aim and shoot in any direction, including behind the character.
How to use it
Aim directly toward the enemy you need to address, including one that has moved behind you. Use the direction of the shot to cover that target instead of assuming every shot must go forward.
Limits to plan around
All-direction aiming changes where you can shoot. It does not make a shot automatically track a target or remove the individual ball’s own behavior.
If it does not work
If The Sentinel is missing, check that you cleared Castle x Ramparts, unlocked the Guard House blueprint, supplied 50 Wood + 100 Crystal, and completed its construction with harvesters.
If the shot behaves differently
If a target is behind you, point the shot toward it rather than continuing to fire forward. Check the chosen ball’s own path and effect when judging whether the shot can connect.
Next steps
Sources & scope
For the Risen Ballbylon expansion released November 12, 2026.
- Official Risen Ballbylon details — expansion access and content.
- Dexerto character unlock reference — biome clears, blueprints, building costs and Crystal sources.
- Dexerto character ability reference — character mechanics; aiming advice here follows from those mechanics.
Game artwork © Kenny Sun / Devolver Digital. Steam interface example © Valve. This is an independent fan guide.