Heretic - Shadow of the Serpent Riders

Heretic: Shadow of the Serpent Riders arrived in 1994 (with the expanded retail version releasing in 1996) as one of the most ambitious dark-fantasy shooters built on id Software's Doom engine. While Doom had established the first-person shooter template on DOS, Heretic distinguished itself by transplanting the formula into a gothic, medieval fantasy world filled with gargoyles, undead warriors, and serpentine sorcerers. The game was developed using a licensed version of the Doom engine, but the team pushed it in notable new directions: players could look up and down (within limits), items could be picked up and stored in an inventory for later use, and the entire aesthetic was drenched in stone corridors, lava pits, and arcane iconography rather than the industrial hellscapes of Doom. Players take on the role of Corvus, an elven warrior battling the Serpent Riders — three powerful sorcerers who have corrupted the world's rulers. The campaign is structured across five episodes, each containing multiple levels capped by a boss encounter. The 1996 retail release, subtitled Shadow of the Serpent Riders, added two full episodes (D'Sparil's Keep and The Stagnant Demesne) to the original three, bringing the total level count to over 40 maps. Controls followed the standard DOS shooter conventions of the era — keyboard-driven movement with optional mouse look — and the game supported the same network play infrastructure as Doom, allowing deathmatch and cooperative sessions over LAN or modem. The weapon roster replaced guns with magical implements: the Elvenwand, Ethereal Crossbow, Dragon Claw, Hellstaff, Phoenix Rod, and the devastating Firemace each had distinct firing arcs and damage profiles, encouraging players to manage ammo types carefully. The inventory system was a genuine mechanical leap: items like Quartz Flasks (health), Tome of Power (weapon amplifier), Wings of Wrath (flight), and the Chaos Device (teleport back to level start) could be collected throughout a level and activated at the player's discretion, adding a layer of resource management absent from Doom. Enemy design leaned into the fantasy theme with Gargoyles, Golems, Disciples of D'Sparil, and the mounted Serpent Rider himself serving as the final boss. Difficulty scaling was handled through four settings, with the hardest mode populating levels with far more aggressive enemy counts. On release, Heretic was embraced by the DOS gaming community as a worthy companion to Doom — it offered a fresh visual identity, the expanded inventory mechanic, and a complete fantasy narrative arc that Doom deliberately avoided. The shareware episode circulated widely, and the full retail release cemented its place as a staple of mid-1990s DOS shooter libraries.