Tetra Online

Tetra Online
Developer(s)	Tetra Dev Studio
Platform(s)	Windows, Linux, macOS
Release	Public Alpha June 13, 2020 Early Access Release November 30, 2020
Gameplay info
Next pieces	5
Playfield size	10 × 20
Hold piece	Yes
Hard drop	Yes
Rotation system	SRS with modified I wallkicks

Tetra Online is a multiplayer fan game by Tetra Dev Studio, inspired by Puyo Puyo Tetris. The game was removed from Steam on December 9, 2020, due to a DMCA notice filed by The Tetris Company.

Gameplay

Tetra Online is a Guideline-based game that has three standard single-player modes and one multiplayer mode.

Modes

• Endurance: Standard 150-line Marathon mode.
• 40L: Time attack mode.
• Score Challenge: 2-minute score attack mode.
• Versus: Standard 1v1 multiplayer mode with garbage line attack system.

Rotation System

Tetra Online uses a modified version of SRS, in which the kick tables for the I piece are mirrored from the left side. This allows for symmetrical wall kicks similar to Tetris The Grand Master 3 Terror-Instinct; however, the way the kick table is mirrored allows several situational placements that are impossible in regular SRS to be executed effectively.

As in Guideline SRS, the shown placement can be achieved by rotating clockwise.

In the symmetric position, this can now be achieved by rotating clockwise or counter-clockwise.

Likewise, this placement is possible in the symmetrical kick system where the regular SRS would fail to execute.