Left to right, up to down
Character - Series

Gargantua - Half-Life
Sideways (Derek) - Sideways (The New Age of DC Heroes)
Crusader - Darkest Dungeon
Goris - Fallout 2
Aegislash - Pokemon
(Charles) Snippy - Romantically Apocalyptic
Atomic Robo - Atomic Robo
Inui Juzo - No Guns Life
Leper - Darkest Dungeon
Artanis - Starcraft Brood War/Starcraft 2 Legacy of the Void
Alarak - Starcraft 2 Legacy of the Void
Doomguy - DOOM
Senketsu - Kill la Kill
Meta Knight - Kirby
Alphonse Elric (armor) - Fullmetal Alchemist
Elias Ainsworth - The Ancient Magus' Bride (Mahou Tsukai no Yome)
Eligor - Shin Megami Tensei
HK-47 - Star Wars Knights of the Old Republic 1, and 2: The Sith Lors
Garrus - Mass Effect
Diego Brando - JoJo Part 7 Steel Ball Run
Jonathan Joestar - JoJo Part 1 Phantom Blood
Xan Kriegor - Unreal Tournament
Loader - Risk of Rain
General Grievous - Star Wars
Outworld Devourer - Dota 2
Takumi - Initial D
Keisuke - Initial D
Raiden - Metal Gear Solid
Acrid - Risk of Rain
Nyx Assassin - Dota 2
Sven - Dota 2
Toyota MR2 AW11
Mazda RX-8