A military training program carried out in a computer-generated virtual environment (Virtual Reality). It allows soldiers to train in realistic combat situations without danger to life or limb. This eliminates the disparity between training and actual combat and gives soldiers the mindset they need to fire on the enemy in combat without hesitation.
The Genome Soldiers underwent VR training prior to their deployment to Shadow Moses Island. When Raiden began his mission in the Big Shell, he had completed over 300 VR training missions. These missions could even recreate events like the Shadow Moses Incident and the sinking of the tanker.
Solidus Snake ridiculed soldiers who underwent VR training, saying "it's a program for raising the ultimate soldiers...people for whom killing is like a video game."