1. to finish or accomplish a particular stage or period of a process, project, or game
We need to complete the phase before moving to the next stage of development.
Precisamos completar a fase antes de passar para o próximo estágio do desenvolvimento.
2. in video games, to successfully finish a level or stage
I finally managed to complete the phase without losing any lives.
Finalmente consegui completar a fase sem perder nenhuma vida.