Computer game is a form of computer software, run on a personal computer or games machine and played by one or more people using a keyboard, mouse, control pad, or joystick. Computer games usually combine sound and graphics and range from traditional games such as chess to fast-moving action games or complex puzzles. But on my own definition, I defined it as where teenagers spent their daily allowances to. On our generation nowadays, a lot are addicted to such online games like DOTA, KOS, Counter strike, Crazykart, and many more.

Once you’ve started to play one of these, I’m sure you’ll never get tired of it. One certain online game which I was very addicted to was O2jam. O2jam is an online casual rhythm video game developed in South Korea by O2Media. Playing the game is divided between finding a room to play in, selecting a song, and playing a song. There are music-halls, technically servers, on which a user can play in.

There are many versions in different countries. In our version, there are six servers, all of which are free-to-play.After choosing a server on which to play, the player (commonly called an O2Jammer in the O2Jam community) is presented with a list of "channels", each with a max limit of 100 users. Upon selecting a channel, the player is presented with a list of rooms.

The player may choose a single, VS, album, couple, or jam room to play manually or can create its own choice of room. The player can select one song to play over 560 songs available to the version. Upon playing the song, horizontal bars slide down a series of seven columns, each corresponding to a key on the keyboard.The default keys on the keyboard are S, D, F, Space, J, K and L. But the player can change the control settings to which they can play comfortably. Just before the notes hit the bottom of the column, the player has to hit the key corresponding to that column.

Each key press emits a note, vocal, or other instrument that creates a full-sounding song. A correct hit is also rewarded with a small 3D visual effect that is determined by the background on which the players are playing. The grading scale used by the game is, from most accurate press to least, Cool, Good, Bad, and Miss.Consecutive Cool and Good notes add both to the player's combo and to their Jam meter. When the Jam meter fills up (if you get 25 Cools, 50 Goods, or a combination all in one streak), a large number flashes in front of the player's avatar indicating their current Jam Combo.

The goal of the player is to get both a high individual note combo as well as a high Jam Combo. Because the Jam meter fills up faster when a player hits a Cool instead of a Good, two players can both get a full combo (hitting every note as a Cool or Good) but still have a different Jam Combo.When the player gets fifteen Cools in a row, a blue pill appears in the pill meter, with a maximum of five pills. Each one of these pills will transform a Bad hit into a Cool, keeping the player's combo going. After all of the players are done playing the song, their individual scores are ranked against each other, and all players are awarded Gems based on how well they performed.

Every four levels, starting with level 4, a mission will be assigned to the O2Jam player. Unless a player completes the mission, the player's EXP and level will not increase. An O2Jam player can level up from level 0 up to level 100.Upon reaching level 100, the player's experience (EXP) continues to increase, but the level stays at 100. An O2Jam Grand Master has a level of 999.

I myself was stuck on level 27 because the mission was very hard. It was very fast that I was having a hard time coping up with the notes and I was hesitant to memorize it. For 3 years I haven’t opened my account since. And just found out that Philippine server is no longer available anymore. Luckily I heard some news about offline gaming for O2jam.

Hooray for that. But then again, O2jam is just one of the many online games to date that can ruin your future. It’s very addictive!