I solved your algorithm! In Don't Play This Game, each letter is numbered throughout the alphabet, A = 1, B = 2, C = 3, D = 4, E = 5, F = 6, G = 7, H = 8, I = 9, J = 10, K = 11, L = 12, M = 13, N = 14, O = 15, P = 16, Q = 17, R = 18, S = 19, T = 20, U = 21, V = 22, W = 23, X = 24, Y = 25, Z= 26
Figure out which letters are given to you in the 30 letter code and then add their pertaining numbers, once you do this you will find your score /780 Logically the highest you can get is 351.
Example:
IYJMCZOWAVDXBLFTZIDUWJNFKLIMEH 274 / 780
Contains letters: A, B, C, D, E, F, H, I, J, K, L, M, N, O, T, U, V, W, X, Y, Z (Not including: G, P, Q, R, S)
1+2+3+4+5+6+8+9+10+11+12+13+14+15+20+21+22+23+24+25+26 = 274 (Not including 7, 16, 17, 18, 19)
The /780 looks to be the number you get from adding 30 Z's together, given the following algorithm Z = 26, Z x 30 = 780
Although it doesn't seem to play a part in the algorithm so I wonder what it could be for.