I spent an evening writing a cloudformation template for Counter Strike Global Offensive linux server. No, I don't have a life. Yes, you will thank me next time you play with your friends and the laptop cannot handle more than 5 players. (AWS
t2.micro handles 6 players easily, and you can always throw a
c4.large at the problem which is still about $0.13/hr and handles, well, just about anything).
The template sets up a single EC2 instance of type
t2.micro by default, uses the default VPC, and runs the server with “Arms Race” game in a free-for-all mode. Consult Valve's documentataion page if you want to run other games or reconfigure the server in any way. The template also sets up a CNAME record pointing to the instance's public DNS name, so comment the last section out if you don't have a public hosted zone in your Route53.