TETR.IO is a modern yet familiar online stacker based off of Tetris. With its rebalanced attack system and online ranked mode, it has a somewhat large casual and competitive following.
Person 1: "Hey wanna play some Tetris?"
Person 2: "Yeah sure hop on Tetr.io I just learned a new opener!"
by TheVeryGenericUsername April 22, 2021
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that tetris game with amazing graphics and gamemodes
guy 1: hey have you heard about tetr.io

guy 2: *tetra league moments*
by quinetn December 2, 2021
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Tetr.io (Tetrio) is an online Tetris multiplayer game. It is highly regarded for its control and handling customization. It has several main game modes, and a large, highly competitive community. It allows for Account EXP and Easy access to view and friend other accounts, and a fairly accurate cheat-detection system. With all of this considered, Tetr.io is usually the go-to for super high level Tetris players who dont want to play an official game. The game modes are listed below:

40 Lines - Clear 40 lines as fast as possible.

Blitz - Get the highest score possible in 2 minutes.

Zen - Play to practice or experiment without the risk of topping out. Several basic gameplay settings included.

Custom - Play to practice, experiment, or just mess around and have fun! A wide variety of gameplay settings included.

Tetra League - Play Competitively for official ranks ranging from D- to X

Quick Play - Join an ongoing super lobby on your server.

Custom room + Room listing - Join a custom multiplayer room of your choice, or create one yourself.

Tetra Channel - View the leaderboards for solo and multiplayer game modes.
The people on Tetr.io are absolute sweats!!!
by A_Bot_Is_Me May 19, 2022
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Tetris 99 except shittier. Contains about what you'd expect in an online io game, filled with bots, hackers, tryhards, newbies who can't last 30 seconds without being bombarded with T-Spin doubles and Tetris combos.
Overweight dude: I'm level 390 in tetr.io
Normal person: what the hell is tetr.io
Overweight dude: *proceeds to read Genesis 1 NIV*
by HumanusAustralis August 9, 2021
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