Dota 1 Repack is a modified version of the original Dota 1 game, which allows players to play Auto Chess on the older game engine. This repackaged version enables players to experience Auto Chess on an older system or with lower hardware requirements.

Auto Chess is a popular game mode in Dota 2, created by Drodo Studio, a Chinese game development company. It's a strategic game that combines elements of chess and Dota 2, where players draft and place heroes on a board to battle against each other.