Explanation:

• Umbrella was the corrupt company from resident evil that ran questionable government experiments that got compromised by it's own corruption, resulting in the destruction of racoon city.
• UAC is the company from doom who's teleportation experiments resulted in a demonic invasion, in newer versions of the story the experiments were sabotaged.
• Silver Shamrock is owned by a corrupt cultist in the crappy Halloween 3, the film was a failed attempt to turn the franchise into an anthology series.
• You probably should have dug up a cyberdine systems logo instead of using Skynet. Skynet is the hostile AI from terminator.
• OCP is from RoboCop, and suffers from extreme corruption.
• Shinra is the company that runs the corporate dictatorship in final fantasy 7.
• Red Ribbon is apparently a short lived paramilitary org from dragonball.
• Lexcorp is owned by lex luthor, a DC supervillan.
• IGen is from Jurassic park and ran failed dinosaur experiments that frequently run out control
• Weyland-Yutani is a corrupt corporation that is obcessed with capturing xenomorphs for weaponization and experimentation.
• The Mishima Zaibatsu is from Tekken, the corrupt company's owner frequently hosts tournaments.
• Abstergo is the corrupt megacorporation from assassins creed that is descended from the templars and seeks world domination.
• Black Mesa is from half life and was involved in experiments that may have been sabotaged, causing an invasion by xen and later the columbine. Aperture Labs is from portal and its also part of the canon, and it got it's employees killed by a hostile AI. Outside of half life canon, Mann Co. is from TF2 and is probably unethical.
• SCP is a shaddy organzation that contains dangerous creatures and anomalous items. I should note the inclusion was unrelated to the regressive leftist highjacking of the SCP community.
• MOM co is from Futurama and it's owner is extremely corrupt.
• Virtucon is from Austin Powers, it's owner is Dr. Evil.