With Remotly you can play all your PC games remotely from another PC.
Game Mode
When a fullscreen game runs on the host PC, Remotly automatically switches to Game Mode for full mouse and keyboard control.

Switch to fullscreen with the button in the top right corner or press the Ctrl + M hotkey.
Switching control back to your local PC
In Game Mode the mouse is locked to the remote video area. In windowed mode press Ctrl + M to release it. In fullscreen mode press Ctrl + M to exit fullscreen, then Ctrl + M again to switch control back to your local PC.
Forcing Game Mode
Remotly can force Game Control mode for games running in windowed mode: press Ctrl + M and tap the Game Mode icon. Repeat to disable it.