Gaming

The co-op modes are 3 vs 1 and 3 vs AI controlled boss. I only played the vs AI boss, and you all get separate boards until a specific event occurs. Then it merges and everyone gets to put their piece anywhere across the three boards. It only lasts for a little bit, and then the board splits again.

The PvP modes are called:

• Zone battle (incorporates their time-stopping mechanic)
• Score attack (standard Tetris, no interfering blocks for the player lagging behind)
• Classic Score attack (standard Tetris, but you don't get hard drops or holds, and again, no interfering blocks)

One thing I found out is that if you want to play against the CPU, you can just load up a local match and add player's twice on the same controller. The second "adding" will fill the rest with CPUs.

It's available on both PC and Switch. However, from what I could find out, you need the Switch Online membership to play multiplayer online. But you haven't mentioned an interest in that so it should fit your requirements really well.

It's currently 50% off on both Steam and Nintendo eShop

Hope that helps!