system
A chat on subreddit /r/pcmasterrace
human
If I had to guess, WASD becomes 8456.
gpt
Lefty Gamer here. Yes; 8456

Back in the 90s I used the number pad with my right, 0 for jump, '.' for Crouch, reload on enter.  Grenades, torch, ability stuff I'd have in the buttons above and around the 8456.

Nowadays, I find there are a wider range of controls needed in your average FPS, 3PS or Platformer, so I've moved over to IJKL on the main keyboard.  

I also highly recommend Razer's Naga Left Handed mouse - it slopes the correct way (lower on the left) and has 10 mappable buttons on the right for your thumb. It ain't cheap, but I put in the hours to make it worthwhile.

Also... 100% Keyboard Size