Just like Snowy said
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Horrible game. Hundreds of hours spent on playing on the same map, even with lots of heroes.
After first 20-30 hours, u'll start to be too agressive.
After first 100 hours, u'll split up with ur girl friend and u will play dota even more times per week.
After 500 hours, u'll ♥♥♥♥ every mom u will meet.
After 1000 hours... You're nobody. You got no friends, no girldfriend, no knowledge... Everything u have is DOTA.
Do not play this game.