All intoxicants including alcohol and drugs, and Gambling, divination, and sorcery, and all abominations are evil.  The same Noble Word for avoiding them was also used for idols false talk or speech, lying and false testimony (فاجتنبوا الرجس من الاوثان واجتنبوا قول الزور).

Allah Almighty said: "O ye who believe! Intoxicants and gambling, (dedication of) stones, and (divination by) arrows, are an abomination,- of Satan's handwork: eschew such (abomination), that ye may prosper.  Satan's plan is (but) to excite enmity and hatred between you, with intoxicants and gambling, and hinder you from the remembrance of God, and from prayer: will ye not then abstain? انما يريد الشيطان ان يوقع بينكم العداوة والبغضاء في الخمر والميسر ويصدكم عن ذكر الله وعن الصلاة فهل انتم منتهون   (The Noble Quran, 5:90-91)"

Eschew all abominations.  And will you not abstain from all abominations?  The abominations include all intoxicants, gambling and all harmful things.

Also, Gambling and alcohol are some of satan's tools to create enmity, hatred and disunity among the Believers, and to stop the Believers from remembering Allah Almighty and from Praying.  "Satan's plan is (but) to excite enmity and hatred between you, with intoxicants and gambling, and hinder you from the remembrance of God, and from prayer: will ye not then abstain?" (5:91) انما يريد الشيطان ان يوقع بينكم العداوة والبغضاء في الخمر والميسر ويصدكم عن ذكر الله وعن الصلاة فهل انتم منتهون

Allah Almighty calls unto all Muslims TO STOP all gambling and all intoxicants consumption: "eschew such (abomination)" and "will ye not then abstain?" فهل انتم منتهون.
 

Anything and everything which you do that becomes compulsive to you, dominates you, and becomes addictive to a point where you become glued to it and can't get yourself out of it is considered an addiction.  Allah Almighty defines it beautifully in the Glorious Quran as things satan uses to ويصدكم عن ذكر الله وعن الصلاة  "hinder you يصدكم from the remembrance of God, and from prayer" (The Noble Quran, 5:90-91).

So if you are unable to maintain remembrance of Allah Almighty and you are unable to perform your daily prayers due to evil compulsive and excessive things that you may have subjected and surrendered yourself to such as video games, porn, gambling, alcohol, etc..., then you suffer addiction.

To be addicted to anything evil or negative is forbidden in the Glorious Quran, and one must fight it off with all of his will, passion and power.  You must have a strong will:

You must "muster the means" (4:98) to fight your weaknesses.

"eschew such (abomination)" (5:90) and "will ye not then abstain?" (5:91) فهل انتم منتهون.

[004:097] The angels, when they took the souls of those who had been unjust to their own weal, demanded, "What hath been your state?" They said, "We were the weak ones of the earth." They replied, "Was not God's earth broad enough for you to flee away in?" These! their home shall be Hell, and evil the passage to it -

[003:139] Do not weaken and do not grieve. You will come up on top, if you are the believers.

[004:075] What is wrong with you? Why would you not fight for the sake of Allah on behalf of the weak and oppressed men, women and children? Those who pray (to Allah), “Our Lord! Rescue us from this town; its residents are cruel. Raise, by Your grace, an ally for us. Grant us by Your will a helper!”

You must not succumb, retire or surrender yourself to any evil.  Also, always fight the good fight; fight for the oppressed and fight injustice so no more tumult remains.  Yes, you can't always be victorious, but you must not ever given in or give up to evil, and you must always keep the good fight for Allah Almighty's sake in you at all time, and always put your trust and faith in Allah Almighty.  This is what Islam calls doing Jihad against yourself, which includes defeating and overcoming your weaknesses and temptations.  Do not allow yourself to ever become and addict.  The following is from Entry #50 above:

All intoxicants including alcohol and drugs, and Gambling, divination, and sorcery, and all abominations are evil.  The same Noble Word for avoiding them was also used for idols false talk or speech, lying and false testimony (فاجتنبوا الرجس من الاوثان واجتنبوا قول الزور).

Allah Almighty said: "O ye who believe! Intoxicants and gambling, (dedication of) stones, and (divination by) arrows, are an abomination,- of Satan's handwork: eschew such (abomination), that ye may prosper.  Satan's plan is (but) to excite enmity and hatred between you, with intoxicants and gambling, and hinder you from the remembrance of God, and from prayer: will ye not then abstain? انما يريد الشيطان ان يوقع بينكم العداوة والبغضاء في الخمر والميسر ويصدكم عن ذكر الله وعن الصلاة فهل انتم منتهون   (The Noble Quran, 5:90-91)"

Eschew all abominations.  And will you not abstain from all abominations?  The abominations include all intoxicants, gambling and all harmful things.

Also, Gambling and alcohol are some of satan's tools to create enmity, hatred and disunity among the Believers, and to stop the Believers from remembering Allah Almighty and from Praying.  "Satan's plan is (but) to excite enmity and hatred between you, with intoxicants and gambling, and hinder you from the remembrance of God, and from prayer: will ye not then abstain?" (5:91) انما يريد الشيطان ان يوقع بينكم العداوة والبغضاء في الخمر والميسر ويصدكم عن ذكر الله وعن الصلاة فهل انتم منتهون

Allah Almighty calls unto all Muslims TO STOP all gambling and all intoxicants consumption: "eschew such (abomination)" and "will ye not then abstain?" فهل انتم منتهون.

Allah Almighty's Forgiveness and Mercy are always there for the weak.  But you must be genuine and not false:

[004:098] Except for the men, women and children who are weak and oppressed! They are unable to muster the means (to migrate), and (therefore) find no way out.

[004:099] Perhaps, Allah will grant forgiveness to those (weak) ones. Allah is oft-Pardoning, and the most Forgiving!

You must "muster the means" (4:98) to fight your weaknesses.  Do not be false and easy target and prey for satan.  You can also fight addiction with fasting and praying to Allah Almighty, because they both strengthen your self-restraint:

[002:183] O ye who believe! Fasting is prescribed to you as it was prescribed to those before you, that ye may (learn) self-restraint,-

[029:045] Recite what has been revealed to thee of the Book; and be steadfast in prayer; verily, prayer forbids sin and wrong; and surely the mention of God is greater; for God knows what ye do.

Always stay away from temptations that lead to evil and addiction رجس من عمل الشيطان فاجتنبوه:

[005:090] O ye who believe! Intoxicants and gambling, (dedication of) stones, and (divination by) arrows, are an abomination,- of Satan's handwork: eschew such (abomination)  رجس من عمل الشيطان فاجتنبوه, that ye may prosper.