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