FPS stands for First Person Shooter, most shooting games are FPS, it means you see through the eyes of your caracter will see your weapon. In most FPS games you have fire arm weapons and you objective is to kill enemys. The most well known FPS are Call of Duty, Halo etc. Most of these games have an online mode, enabling you to play with thousands of other users from all around the globe. You can play in solo mode or in teams.

MMO stand for Mass Multiplayer Online, nowerdays most games have an MMO feature.

MMORPG stands for Mass Multiplayer Role Online Playing Game, in these games you have an arial view or a third person view of the action / caracter. They are obvioulsy played online and the game happens in roles. The most well known MMROPG are from the Blizzard games company. They created the Warcraft series, and their most famous game is World of Warcraft, where you create a caracter, can choice the race (elf, dwarf, human etc), job, specialty etc. And then your objectiv is to gain levels by accomplishing quests and fighting. This is a very addictive game and has millions of players.

People who play computer games all the time are called No-lifes, because they do not have a social life. This phenomena has encreased a lot with MMROPGs, especially in Japan, where  they are big fans of video games. In some extra cases some gamers have played for more than 3 days in a row without any sleep or meals. And in a few of these extreme scenarios gamers have died from starvation of dehydration. All of that for a video game.

Geeks are nerds, or people who are often very good in math and sciences and love computers. Most of them spend all their time on computers playing games or programming. Most geeks are also no-lifes. People who are anti-social or like being alone.