How many games in the Halo series feature Master Chief as the main character?
4
3
3
3
3
3
3
3
5
3
5
3
5
3
4
5
3
4
2
5
3
4
2
6
5
3
4
1
2
6
5
3
4
1
2
6
5
3
4
1
2
6
5
3
4
1
2
6
7
5
3
4
1
2
6
7
5
3
4
1
2
6
7
5
3
4
1
2
6
7
5
3
4
1
2
6
7
5
4
1
2
6
7
8
5
4
1
2
6
7
0
8
5
4
1
2
6
7
8
5
0
4
1
2
6
7
8
5
4
1
9
0
2
6
7
8
5
4
1
9
2
6
7
0
8
5
4
1
9
2
6
7
8
0
4
1
9
2
6
7
8
4
1
9
2
6
7
8
1
9
2
6
7
8
1
9
6
7
10
8
1
9
7
10
8
9
7
10
8
11
9
7
10
8
13
11
9
7
10
8
13
11
9
12
10
8
13
11
9
12
10
8
13
11
9
12
ten
10
8
13
ten