That will depend on the requirements and compatibility of the specific games you want to play. The Lenovo Chromebook 3 14 ships with the Chrome Operating System and is compatible with Google Play Store APPs. We recommend you check with the specific game's software publisher's web sites, of the specific games you want to play, for their compatibility with the Chrome operating system and the minimum/recommended hardware requirements (Is a Graphics card required, the processor speed and the minimum required system RAM and the minimum available hard drive space) to run their program, then compare those requirements to this system's configuration.

Yes, the Lenovo Chromebook 3 14 model number 82KN0000US, ships with a MicroSD Card Slot built in.

The Lenovo IdeaPad 3 15 Laptop, model number 81W1018XUS, ships with 8GB DDR4-2400MHz RAM (4GB Soldered DDR4-2400 + 4GB SO-DIMM DDR4-2400MHz RAM), one memory soldered to systemboard, one DDR4 SO-DIMM slot, dual-channel capable. The maximum supported RAM for this configuration is: Up to 12GB (4GB soldered + 8GB SO-DIMM) DDR4-2400MHz RAM. We recommend you consult with your certified technician about your RAM upgrade options.

That really depends on the requirements and compatibility of the games you want to run. This Lenovo IdeaPad 3 15 Laptop, model number 81W1018XUS, ships with Windows 10 S-Mode 64-bit Operating System installed. Windows 10 S-Mode provides added security by only allowing APPs available ( and therefore certified by Microsoft) at the Microsoft Store. If you don't need the added security or you need to install APPs not available at the Microsoft Store, you can switch to standard Windows 10 Home 64-bit Operating System, at no additional cost. We recommend you check with the specific game's software publisher's web sites, of the specific games you want to play, for their compatibility with Windows 10 S-Mode 64-bit operating system and the minimum/recommended hardware requirements (Is a Graphics card required, the processor speed and the minimum required system RAM and the minimum available hard drive space) to run their program, then compare those requirements to this system's configuration. If you choose to switch out of S-Mode for Windows 10 Home: Here is a link to instructions for switching from Windows 10 S-Mode to Windows 10 Home: https://support.microsoft.com/en-us/help/4456067/windows-10-switch-out-of-s-mode