An amazing little detail I noticed on my recent playthrough is that the very first encounters with Psycho Mantis in MGS1 and MGSV both have him blocking the path to an elevator. :
Kojima discusses some of his favorite characters in the Metal Gear series - Metal Gear Informer
In Metal Gear Solid potete controllare le guardie, con un trucco da Psycho Mantis - SpazioGames
Metal Gear Solid Twin Snakes HD - Psycho Mantis Boss Fight (Remastered) - YouTube
Metal Gear Solid Psycho Mantis Action Figure - Series 1 - McFarlane Toys - GC | eBay
How to Beat Psycho Mantis - Metal Gear Solid Guide - IGN
First 4 Statuette Metal Gear Solido Psycho Mantis Statua Figura Nuovo Sigillato | eBay
Psycho Mantis - Metal Gear Solid by JuanRey-art on DeviantArt
Psycho Mantis from Metal Gear Solid | Game-Art-HQ
Metal Gear Solid: Psycho Mantis Statue di First 4 Figures – info preordini – itakon.it