If the tutorial didnt hook you then this will! Beisiege is the best and cheapest physics based game you will play for years to come, it includes almost everything your imagionation can think of as well as a well molded comunity!

/h1 Unturned, Rules Them All
This is the best onlne zombie survivial game ive aver played, granted I havent played many, despite its blocky graughics it has well designed maps, ai, pvp, and it isnt hard to get going when you know the game!!