How many games are in the Halo series and have master chief as a playable character?
6
3
3
3
3
3
2
3
2
3
2
3
2
3
2
3
2
3
4
2
3
5
1
4
2
3
5
1
4
2
3
5
1
4
2
3
5
1
4
2
3
5
1
4
2
3
5
1
4
2
3
5
1
4
2
3
5
1
4
2
3
5
1
4
2
5
1
4
2
5
1
4
2
5
1
4
2
5
1
4
2
6
5
7
1
4
6
5
7
1
4
6
5
7
1
4
6
5
7
1
4
6
5
7
1
4
6
5
7
1
4
6
5
7
1
6
7
6
7
6
7
8
6
7
9
8
6
7
9
8
6
7
10
9
8
6
7
10
9
8
6
7
10
9
8
6
11
7
10
9
8
6
11
7
10
9
8
6
11
7
10
9
8
6
11
7
10
9
8
6
11
7
13
10
9
8
11
13
10
9
8
11
13
12
10
9
8
11
13
12
10
9
8
11
13
12
3 games
3 games
2 games
3 games
4 games