Is only up multiplayer pc

The PC game Only Up! has some multiplayer versions, such as the following: 

Only Up: LIZARDS MUST FALL: It is an incredible multiplayer parkour game available on Steam since November 30, 2024. It supports up to 8 players to play online. 

Rush: Only Up Multiplayer: Released on Steam on August 31, 2023, it's an MMO 3D platformer. It allows players to jump, do parkour and compete against others. It supports single-player, MMO, online PVP and online co-op modes.

Only Up: With Friends: Launched on Steam on August 17, 2023, it's a multiplayer parkour game where speed is crucial. It offers online PVP and online co-op features, allowing players to race against friends and players from around the world. 

Only Up: SKIBIDI TOGETHER: It's a multiplayer parkour game. The v1.1 online version supports official simplified Chinese and various devices like keyboards, mice and gamepads.