I need to download gamemode

i have a low end laptop and i like to play some games to pass the time but im avering 50 fps and i heard about gamemode that could help me get more fps but i don't know how to download it could you please help me

Would this help?

Scroll down to where it says development.

sudo apt search gamemode
Sorting... Done
Full Text Search... Done
gamemode/focal-updates 1.5.1-0ubuntu3.1 amd64
  Optimise Linux system performance on demand

gnome-shell-extension-gamemode/focal 4-2 all
  gnome-shell extension that monitors the current status of gamemode

libgamemode-dev/focal-updates 1.5.1-0ubuntu3.1 amd64
  Optimise Linux system performance on demand (dev files)

libgamemode0/focal-updates 1.5.1-0ubuntu3.1 amd64
  Optimise Linux system performance on demand (libraries)

libgamemodeauto-dev/focal-updates 1.5.1-0ubuntu3.1 amd64
  Automatically optimise system performance on demand (dev files)

libgamemodeauto0/focal-updates 1.5.1-0ubuntu3.1 amd64
  Automatically optimise Linux system performance on demand

So I'd do:
sudo apt install gamemode

... and if you want the gamemode monitor:
sudo apt install gnome-shell-extension-gamemode

... the packages that start with 'lib' are code libraries, they'll be pulled in if they're needed when you install the main program.

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