In terms of game file size, you will need at least 1 GB of free disk space available. To play Absent you will need a minimum CPU equivalent to an Intel Core 2 Duo E8400. Provided that you have at least an NVIDIA GeForce GT 240 graphics card you can play the game. Absent system requirements state that you will need at least 65 MB of RAM.
Absent will run on PC system with Windows XP, Windows 7 and upwards.