Play checkers:
Enter CHCKRS as a password.

Play chess:
Enter CHCKMT as a password.

Play Invaders:
Enter ZNXNVR as a password.

Level	Password
2	YTBHMGH
3	JRQDGNP
4	RCZKTLN
5	PWDNRSX
6	TZBMHKL
7	CKXLDCN
8	KCCRZRT
9	MBNVXJC
10	QQKFVWD
11	NZSTDTP
12	LYHJLBN
13	DLGFHQK
14	HSJVLXF
15	FZRJTVP
16	GYWCKTH