When were computer games first created

Very shortly after computers were. Computer games have definitely existed since the 1960s; it's at least likely that rudimentary games existed before that, but computers themselves were rare (and expensive) at the time. One of the earliest digital computer games was tic-tac-toe. Later on text adventures, such as "collosal cave" became popular. "Pong" was one of the earliest popular digital video games, a game that was somewhat similar to ping pong.