Diabotical

Diabotical is a 2020 multiplayer-only first-person shooter developed by Swedish team GD Studio. It is in the Arena FPS genre and features gameplay similar to Quake III Arena and its successors, with a variety of game modes, weapons, and complex movement mechanics. "Diabotical" uses an engine written from scratch, the "Glitch Engine".
The game entered closed beta on February 28, 2020, with a full release on September 3, 2020. The game is free to play, and $250,000 has been set aside for esport competitions in the game's first year.