Alternative ways to switch between applications if cmd+tab doesn't work

What are alternative ways to switch between applications?

Cmd+tab doesn't work for me in some games (for example, "Crusader Kings II", "The Talos Principle" on steam). So i have no ability to switch to another application (like Safari) when nided unless I quite the game. This is very inconvenient. I tried also Cmd+H and Cmd+Alt+H, they doesn't work ether. Cmd+Alt+Esc force quits the game immediately.