How many games were in the original Halo series?
3
3
3
3
3
3
3
3
5
3
5
3
4
5
3
4
5
3
6
4
5
3
6
2
4
5
3
6
2
4
5
3
6
2
4
5
3
6
2
4
5
3
6
2
7
4
5
3
6
2
7
1
4
5
3
6
2
7
1
4
5
3
6
2
7
1
4
5
3
6
2
7
1
4
5
6
2
7
8
1
4
5
6
2
7
8
1
4
5
6
2
7
8
1
4
5
6
2
7
8
1
4
5
0
6
2
7
8
1
4
5
9
0
6
2
7
8
1
4
5
9
6
2
7
0
8
1
4
9
6
2
7
8
1
4
9
0
6
2
7
8
1
9
121
0
6
2
7
10
8
1
9
ten
2
121
7
10
0
8
1
9
7
ten
10
8
1
13
121
9
0
7
10
8
1
13
ten
9
121
0
7
10
8
1
13
9
12
ten
121
7
10
0
8
1
25
13
117
9
108
12
62
ten