Short answers, pulled from the story.
The Legend of Zelda: Ocarina of Time 3D for the Nintendo 3DS stands as a clear example of a video game remake. It features new character models and texture packs that distinguish it from a simple port or remaster.
Resident Evil 2 (2019) is a remake of the 1998 game with significant changes to movement mechanics. While the original uses tank controls and fixed camera angles, the remake features over-the-shoulder third-person shooter gameplay similar to Resident Evil 4.
Gun Fight was released by Midway in 1975 as a reprogrammed version of Taito's arcade game Western Gun. The main difference being the use of a microprocessor in the reprogrammed version allowed improved graphics and smoother animation than the discrete logic of the original.
Warren Robinett created Adventure for the Atari 2600 in 1980 as a graphical version of the 1970s text adventure Colossal Cave Adventure. This title represents an early example of converting games between platforms due to limited hardware capabilities.
In November 2014, the team reported to have finished half of the remake's environment, over 10,000 new dialogue lines, and three hours of series-inspired soundtrack. The remake team includes over 70 volunteers in artist, composer, designer, developer, and voice-actor roles.