Sub-Terrania

During the course of the game, the player controls a rotatable craft with thrusters that is constantly subject to gravity and the craft's inertia. Using the ship's "rotate-and-thrust" capabilities, the players must aim, shoot, dodge, and carefully maneuver their way through the hazardous landscape while constantly taking gravity and refueling needs into account. It was the first game developed by Zyrinx, a small studio formed by people who had been active in the demoscene during the late 1980s and early 1990s. Upon its release, Sub-Terrania gained a reputation as an "overly difficult" game and suffered from poor sales. However, critical reception was positive with game journalists describing it as an evolution of gravity-based shoot 'em up games like Gravitar (1982) and Thrust (1986). Critics praised its originality, graphics, and soundtrack, while noting that getting used to the game's control system and physics-based gameplay can take some time.

• Title — Sub-Terrania • Developer — Zyrinx • Publisher — Sega • Producer — Tony Van • Programmer — David Guldbrandsen Karsten L. Hvidberg Jens Bo Albretsen Thomas Risager • Artist — Jesper Vorsholt Jørgensen Mikael Balle Karsten Lund • Composer — Jesper Kyd • Released — April 1994 • Genre — Multidirectional shooter • Modes — Single-player • Platforms — Mega Drive/Genesis

On an off-world asteroid, a red line wipes the sky as headquarters explodes. Hostile alien forces have invaded the vital subterranean mining colony. Workers are trapped in crevices and chasms, helpless against the clouds of radioactive dust swirling toward them. An experimental attack fighter is the only weapon powerful enough to repel the alien attack. A lone pilot has been charged with the task of defeating the aliens and rescuing the trapped miners.

• Illustration — Fighting insects in the first level of the game The game takes place in a side view underground environment. At all times, gravity is pulling down on the player's ship, which can work to the player's advantage to conserve fuel. The controls are similar to other gravity-based shoot 'em up games, like Gravitar and Thrust. The ship is rotated with the directional pad and the B button applies thrust in the direction it is facing. A key difference compared to other games of this type is the addition of back thrusters, which allow the players to reverse thrust as they try to dodge enemy fire and maneuver their way through the game's hazardous landscapes. Its controls can be manually configured before the game is started. In Sub-Terrania, each level is an enclosed map in which the player is free to wander in all directions. To beat each of the game's 9 levels, the players must complete various mission objectives, which are outlined before the level begins (with the exception of the last three levels). The bulk of the missions involve rescuing trapped miners, carrying and utilizing various types of special equipment, collecting sub modules (to allow your attack ship to go underwater), and defeating alien bosses. While the players are, for the most part, free to approach things however they want, a key part of the gameplay revolves around finding efficient routes for each level. The ship is equipped with a force field and will explode if it sustains too much enemy damage. It also has a limited supply of fuel and must be constantly recharged by collecting fuel canisters which are strategically placed throughout the levels, requiring players to plan when and where to refuel. There are various other elements that make it easier for the player to be able to finish without running out of fuel. Mining rails are suspended throughout many levels allowing players to freely slide along them while shooting. Attaching the ship on the rails turns off fuel consumption and nullifies the effects of gravity which can make for easier targeting against bosses and barriers. Scattered across the game's levels the players can find missile canisters (which equip the ship with secondary weapons), shield upgrades (which replenish the ship's force field), extra lives, and various types of special equipment. When the "Mega" bar is fully-charged, the ship can also unleash a powerful multi-directional laser blast. Once used, the bar gets depleted and begins to recharge automatically. There are three types of weapons in the game, identified by three different colors (red, green, and blue). Each weapon type has its own upsides, downsides, and different strategies, with varying degrees of destructive power, range and a different effect on the rate of the ship's fuel-consumption. All three weapon types can be upgraded up to level 4 by collecting power-ups which cycle though red, green, and blue. The player can either take on the color of the laser they already have to increase its firepower by one level, or they can take on a different color to change the laser's attributes. When players lose a life, their weapon's power is downgraded by one level. However, this does not apply on Easy mode, in which players are allowed to retain their weapon enhancements even after losing a life. Sub-Terrania features three difficulty modes (Easy, Normal, and Hard), all available from the start. Each difficulty mode affects the rate of fuel-consumption, the strength of the gravitational pull, the intensity of inertia, the amount of enemy damage that players can sustain, and the number of bonus points at the end of each stage. In Sub-Terrania, players earn points for shooting down enemies and are also rewarded with end-of-level bonus points based on their overall performance. This includes their remaining lives after a mission, the number of enemies destroyed, the number of POWs rescued, and their time-efficiency in completing the mission. Compared to normal mode, players get half as many points on easy and twice as many on hard.

• Illustration — Zyrinx did not possess an official Sega development kit. Sub-Terrania was the first game developed by Zyrinx, a small studio formed by people who had been active in the demoscene during the late 1980s and early 1990s. Most of them were prominent members of the demogroups "Crionics" and "The Silents". Their 1991 Amiga demo "Hardwired" shares many of the visual effects and styles later used in their Mega Drive games, Sub-Terrania and Red Zone. Crionics was disbanded shortly after Hardwired was completed, with several of their members joining The Silents. However, it was not long before The Silents suffered the same fate. Most of their Swedish members decided to form DICE and work on games like Pinball Dreams and Benefactor for the Amiga. On the other hand, their Danish members – David Guldbrandsen, Karsten Hvidberg, Jens Bo Albretsen, Michael Balle, Jesper Jørgensen, and Jesper Kyd – decided to form Zyrinx and develop games for the Mega Drive, mainly because they were impressed by the amount of sprites that Sega's console was able to handle compared to the Amiga. During the development of Sub-Terrania, Zyrinx did not possess an official Sega development kit. Instead, they hacked together their own development kit using Amiga computers. Sub-Terrania was bought and published by Sega, which gave Zyrinx enough money to relocate their offices from Copenhagen to Boston. Furthermore, the game was originally too difficult and went through two rounds of difficulty reduction before it was released. The game's soundtrack was composed by Jesper Kyd using a proprietary audio system that played music at a 44 kHz quality instead of the standard 11 kHz. The long tracks are unique, with many of them going over the five minute mark, while other tunes at time didn't cross one minute; the metallic and industrial sound-like matches with the underground style of the game. His sound driver was also used in Red Zone, The Adventures of Batman & Robin (Mega Drive/Genesis version), Pro Moves Soccer, and Ultracore.

Despite the game's title screen (and credits) implying a 1993 release, Sub-Terrania was released in 1994. Upon its release, it gained a reputation as an "overly difficult" game and suffered from poor sales. In a 2005 interview with Sega-16, Sega of America producer Tony Van commented on the matter, saying: "I personally could finish the game, and I'm not anywhere near as good as most gamers, so I think it got a bad rap – a few people were put off by it, and the rest just agreed without trying it. It was one of the WORST selling games Sega of America ever released, which surprised me... Gamers usually LOVE a challenge!" In the May 1994 issue of Mega, editor Andy Dyer criticized Sega of Europe for not giving a high-quality game enough attention, stating that "not only did [Sub-Terrania] arrive pretty much totally unannounced, but Sega seemed to have a sense of complete apathy when promoting the game". On the other hand, Sega of America held a Sub-Terrania contest between April and July 1994. Participants were tasked with playing the game on the hardest difficulty setting and taking a picture of the victory screen after defeating the final boss. The prizes included: all-paid weekends in New York and Los Angeles to attend the Marvel Mega-Tour, VIP tours of the Marvel headquarters, Sega Genesis CDX systems, three games (Gunstar Heroes, Ranger X, and Thunder Force IV), limited editions comic book ashcans and Sub-Terrania hats and T-shirts.