So it's a Doom wad?
(maniacal grin)
É̷̞̣̹̟̟̬͎́̄̄̈́͆͌͌̋X̶͓̲̫̫̝̣̑͐̀̂̒̍̀͊̐̈́̕C̶̢̖͎̹͓͉͈̱̹͎̰̋͆̌̓̎̈̓̔̕Ȩ̸̨͎͙̳̙̃ͅL̴̛̜̫͔̘̦̹͕̠̱͙̑̒́̍͗̔̈́́̒͝L̵̢̨̝̩̺̞͙͓̪̰̞͙̯̲̄̑ͅȨ̸̢̡̬̬̻̜̟͖̺̞̼̹͂̈̋̋̈̈̊͘͜N̷̢͍̙̫͙̣͙̖͙̋̆̈́̾̎̓͑͌̄̓́̇̋͘͘T̸̡͇̦͇̈́̎́͆̅̂̆̒͋͐̚͝.̴̳̳͚̒̀̃
So it's a Doom wad?
(maniacal grin)
É̷̞̣̹̟̟̬͎́̄̄̈́͆͌͌̋X̶͓̲̫̫̝̣̑͐̀̂̒̍̀͊̐̈́̕C̶̢̖͎̹͓͉͈̱̹͎̰̋͆̌̓̎̈̓̔̕Ȩ̸̨͎͙̳̙̃ͅL̴̛̜̫͔̘̦̹͕̠̱͙̑̒́̍͗̔̈́́̒͝L̵̢̨̝̩̺̞͙͓̪̰̞͙̯̲̄̑ͅȨ̸̢̡̬̬̻̜̟͖̺̞̼̹͂̈̋̋̈̈̊͘͜N̷̢͍̙̫͙̣͙̖͙̋̆̈́̾̎̓͑͌̄̓́̇̋͘͘T̸̡͇̦͇̈́̎́͆̅̂̆̒͋͐̚͝.̴̳̳͚̒̀̃
this is indeed using standard doom tooling but a custom game engine.