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Master Stacker: Tower TrialsNewsNew Grid Locked mode
In-game event

New Grid Locked mode

Master Stacker: Tower Trials · published 6 Sep 2026, 20:38 UTC · build 25155949

All newsPlayers around this dateRead on Steam

Master Stacker Update — Grid Mode & Solo Online

New Grid Mode

A new Grid game mode has been added!

Choose between Tetracubes and Pentacubes and build with connected 3D cube pieces. Tetracubes feature familiar four-block shapes adapted for 3D stacking, while Pentacubes introduce larger and more complex five-block pieces. Pentacubes might be too hard, can you play it?
Dig down included, dig yourself out of trouble in the new modes.
Level 20 start included. Mode starts too slow for you? well here you go.

Solo Online

Want to set records but can't find someone to play against you in that mode? Added a new Solo Online mode for players looking to compete for records in a verified online session. Pick what game mode you want to play. if nobody joins in 5 seconds you will be able to play solo with global records enabled.

Placement Improvements

  • Improved placement and support detection for complex block shapes.

  • Fixed some valid Tetracube placements incorrectly appearing invalid.

  • Fixed cases where the placement preview could appear valid while slightly intersecting another block.

  • Improved placement behavior on edges and uneven surfaces.

  • Improved support detection for wedges and rotated pieces.

  • Improved placement ghost and footprint visibility.

Fixes & Polish

  • Fixed occasional placement inputs being ignored.

  • Fixed several queued/pair placement edge cases.

  • Fixed several Sandbox tool and save/load issues.

  • Fixed potential Sandbox synchronization issues.

  • Various smaller gameplay, UI, and stability improvements.