Someone made a 16-bit, video game-inspired version of the first part of the battle between the Avengers and Thanos. It goes up until the point when the armies both arrive, which is about the halfway point of the video. After that, the creator talks for a while about how he made it.
Also, in case you missed it, here's Cap, Thor, and Iron Man vs. Thanos in stop-motion animation:
Also, in case you missed it, here's Cap, Thor, and Iron Man vs. Thanos in stop-motion animation: