Do you know good games that I can play on a laptop with a maximum of 2.7 GHz?

My CPU: Intel Core i5 2410U

For example, GTA5 works reasonably smoothly on my laptop.

Minecraft, Terraria, 2D Games, Counter Strike, possibly League of legends or dota. Almost everything before 2010 that is not crysis.

Not only the CPU plays an important role in gaming, but also the graphics card (in your case probably graphics chip.) And the RAM are important components. So I need more details on the hardware of your laptop.

GTA San Andreas, GTA 4, Anno 1701

Tetris, Minesweeper, Clicker Heroes, NGU Idle, Pixel Puzzles

Garry's Mod,

Half life,

CSS,

TES: Oblivion, depending on the GPU also Skyrim,

Dark Souls, (depending on GPU)

GTA: SA