Game modes include a survival mode (in which players must acquire resources to build in the world and maintain health) and a creative mode (in which players have unlimited resources and access to flight). The game's large community also offers a wide variety of user-generated content, such as modifications, servers, skins, texture packs, and custom maps, which add new game mechanics and possibilities. Minecraft has received critical acclaim, winning several awards and later being cited as one of the greatest video games ever created. Social media, parodies, adaptations, merchandise, and the annual Minecon conventions played prominent roles in popularizing the game. The game has also been used in educational environments to teach chemistry, computer-aided design, and computer science. In 2014, Mojang and the Minecraft intellectual property were purchased by Microsoft for US$2.5 billion.
