The cheapest graphics card you can play it on is an NVIDIA GeForce 6200. An Intel Pentium 4 2.00GHz CPU is required at a minimum to run Return NULL - Episode 1. You will need at least 250 MB of free disk space to install Return NULL - Episode 1. Return NULL - Episode 1 system requirements state that you will need at least 512 MB of RAM.
Return NULL - Episode 1 will run on PC system with Windows XP or later and upwards. Additionally it has Mac and Linux versions.
Minimum System Requirements
CPU
2.5GHz processor
RAM
4 GB RAM
OS
10.6.6 or later
Graphics Card
Open GL 3.0 compatible
HDD Space
250 MB available space
Minimum System Requirements
CPU
1.4GHz processor
RAM
4 GB RAM
OS
Ubuntu 12.04 and Newer
HDD Space
250 MB available space
Show Return NULL - Episode 1 system requirements on your site