How many Double Dragon games are there for NES?
3
2
2
2
2
2
2
3
2
3
2
3
2
3
2
1
3
4
2
1
3
4
2
1
3
4
2
1
3
4
2
1
5
3
4
2
1
5
3
4
2
1
5
3
4
2
1
5
3
4
2
1
5
6
3
4
2
1
5
6
3
4
2
1
5
6
3
4
1
5
6
3
4
1
5
6
3
4
1
5
6
3
4
0
1
5
6
3
4
7
1
5
0
6
3
4
7
1
5
6
0
4
7
1
5
6
10
4
8
7
0
1
5
6
10
4
8
7
1
5
0
6
10
4
8
7
5
6
0
10
8
7
5
6
10
8
7
5
9
6
10
8
7
5
9
6
10
8
7
9
6
10
8
7
9
6
10
8
7
9
6
10
8
7
9
6
10
8
7
13
9
10
8
7
13
9
10
8
7
11
13
9
10
8
7
11
13
9
10
8
7
11
13
9
10
8
7
11
ten
ten
ten