Grandma is a free steam meme game and a parody. You have two maps but 6 different game modes. You can play this single player or multiplayer. There can be up to 50-100 players of either actual player or bots but it can become hectic and crowded if you are playing on the office one instead of the backrooms one.
The game modes are Conquest, Free for all, kill conformed, team death match, rush, capture the flag. Everyone is split on two teams, Aliens and robots vs presidents, vice presidents, dictators, world leaders, kings, queens and memes including the pope.
Basically the humans are trying to take out the aliens and robots and win the objectives. There are primary weapons like snipers, shotguns, SMGs, and secondary weapons like Glock 18. There are also proxy mines and grenades. This game is just a parody and a meme game and it is fun.