Because of "Rogue"s popularity at colleges in the early 1980s, other users sought to expand or create similar games to "Rogue". However, as neither Toy, Wichman, nor Arnold released the source code of the game, these efforts generally required the programmers to craft the core game elements from scratch to mimic "Rogue". Though there were multiple titles that tried this, the two most significant ones were "Moria" (1983) and "Hack" (1982). Both games spawned a family of improved versions and clones over the next several years, leading to a wide number of games in a similar flavor. These games, which generally feature turn-based exploration and combat in a high fantasy setting in a procedurally-generated dungeon and employing permadeath, are named roguelike games in honor of "Rogue"s impact. Most of the graphical interface conventions used in "Rogue" were reused within these other roguelikes, such as the use of codice_6 to represent the player-character.