The games industry is now a massive multi billion dollar business and development teams can number 50 or more. My first game had me as programmer, artist, and beep designer – (well it wasn’t proper sound!). I did everything. Back then games were written in assembler and you had to learn 6502 and Z80. Nowadays with a few exceptions games are written in C and C++. The days of back room programmers aren’t entirely gone- there is also ‘retro remake’ and ‘indie’ scene, e.g. Retrospec but unless you have an exceptionally brilliant idea, you are not likely to get into the mainstream game business as a one man outfit writing Blockbuster PC games..