In order for you to play Ikaruga on Windows with minimal graphics settings, your computer must meet the following requirements
OS *:
Windows 8 / 7 / Vista / XP
Processor (CPU):
Intel Core2 Duo / Athron64 X2
Memory (RAM):
1 GB RAM
Graphics Card:
DirectX 9.0c support (256 MB VRAM)
DirectX:
Version 9.0c
Storage:
512 MB available space
Sound Card:
DirectX 9.0c support
In order to play Ikaruga on Windows with maximum graphics settings, you need a computer with a configuration no worse than the following
OS *:
Windows 7
Processor (CPU):
Intel or AMD multicore processor recently 5 years
Memory (RAM):
2 GB RAM
Graphics Card:
NVIDIA or AMD in recently 5 years
DirectX:
Version 9.0c
Storage:
512 MB available space
Sound Card:
DirectX 9.0c support