Mattis "Bomb Boy" Grahm - is a video game artist. Mattis "Bomb Boy" Grahm began his career in 2009 and has worked for companies such as 4J Studios, Mojang and Microsoft Studios. Mattis "Bomb Boy" Grahm's first game was Minecraft which was released 14 years ago. Best Game Mattis "Bomb Boy" Grahm contributed to was Minecraft. Mattis "Bomb Boy" Grahm's latest work is Minecraft which was released 14 years ago.