function games(arr) {
  let gameAcc = arr[0];

  for (let i = 1; i < arr.length; i++) {
    if (arr[i].includes("Install")) {
      let currentGame = arr[i].pop();
      gameAcc.push(currentGame);
    }
  }
  console.log(gameAcc);
}

games([
  "CS WoW Diablo",
  "Install LoL",
  "Uninstall WoW",
  "Update Diablo",
  "Expansion CS-Go",
  "Play!",
]);