Havoc

Havoc Is a little-known First Person Shooter by defunct developer Reality Bytes, released in 1995. They made only two other games: a Mac-only Doom clone called Sensory Overload before Havoc, and a third-person Hack and Slash fantasy game called Dark Vengeance, after Havoc. It was advertised as a Killer App for Windows 95, pushing that OS's graphical and networking capability. In the vein of Battlezone 1980, Havoc put players in control of a combat vehicle and pitted them against hordes of foes.

The singleplayer campaign cast you as a sort of land-Pirate, a freelance tank commander wandering the battlefields of a post-apocalyptic Earth ruled by Mega Corps in search of useful loot and supplies. Your enemies are the Mooks of Tyrakian Global, one such Mega Corp. Their forces are spread across three major regions: The mountainous, rocky Badlands, the frozen Fallen Wastelands, and the bizarre, colorful Tyrakian Territories. In each level, there are three Gate Keys to find, each guarded by a powerful Sentry Gun and numerous other foes. Find the keys, then find the exit. Do this for three levels and fight a boss. There are over 30 levels total and six Bosses. You have a wide variety of weapons to use, and a choice of three vehicles.

For its time, the game incorporated a number of cutting-edge features: Varied environments and terrain, terrain deformation, support for virtual reality goggles of the time, and cross-platform multiplayer between PC and Macintosh. The game worked on either system out of the box, and came with a multiplayer-only second disc that could be given to a friend. If you had enough discs to go around, 16-player deathmatches were possible.

This game shouldn't be confused with either film called Havoc. Or the Havok physics engine.

Havoc provides examples of:

 * Alien Sky: In the Tyrakian Territories, the sky is pitch black.
 * Bonus Stage: There's a bonus level after every Boss Fight. Collect floating crystals and "HAVOC" letters for bonus points.
 * Brutal Bonus Level: It's incredibly difficult to actually gather all the crystals and letters, though this isn't necessary to progress.
 * Boss Fight: Six total. Each is a different vehicle with wildly differing weapons and behaviors.
 * Car Fu: Subverted, unfortunately. Ramming enemies (and terrain) tends to just damage your car without doing appreciable damage to them.
 * Competitive Balance:
 * Fragile Speedster: The green BattleCycle.
 * Jack of All Stats: The red HoverCraft.
 * Mighty Glacier: The blue HyperTank.
 * Deflector Shields: Your vehicle has these, though they're really treated as Hit Points.
 * Deadly Disc: The Disc Gun. Notable for it's very distinctive firing sound.
 * Death From Above: The powerful mortar cannon gives you indirect shelling capability. Its fairly hard to use, though.
 * Eldritch Location: The Tyrakian Territories, seen in worlds 3 and 6, are markedly different from the other two zones. Alien Sky, Amazing Technicolor Battlefield, Bizarchitecture and enemies resembling animals can all be found here, as can the game's two oddball bosses: A living cloud of flame and
 * Enemy Detecting Radar: You have a convenient minimap in the lower-right of your HUD. Targets are Color Coded for Your Convenience: Land enemies are red, air enemies brown, sentries blue, static structures green.
 * Energy Beings: The third boss is a giant, living cloud of flame that spits fire at you.
 * Energy Weapon: The primary weapons are all this. In general, they possess a rapid fire rate and infinite ammunition.
 * EMP: The first boss fires projectiles at you that scramble your targeting and radar.
 * Flash Step: The second boss can teleport around in addition to ordinary flight.
 * Frickin Laser Beams: You begin the game with a weak red laser gun. One Power Up you can find makes it blue and stronger, while another nets two lasers per shot.
 * Improbable Aiming Skills: Of a sorts. A certain Power Up vastly expands the range of the targeting brackets on your HUD, temporarily. Your shots auto-track enemies you keep within these brackets.
 * Invincibility Power Up: The "Ultrashield" Power Up has this effect.
 * Kill It With Fire: The slow-firing (relatively), but high-damage Fireball gun.
 * Land Mine Goes Click: A Thermite Mine dropper is available as a secondary weapon. Watch out, as some enemies and bosses can also drop these.
 * Mirror Boss: The fifth boss uses an identical vehicle and weapons to yours.
 * Power Up: A staggering variety: Shield bonuses, Temporary invulnerability, new weapons, weapon upgrades and ammo, the "targeting bonus" and others.
 * Scoring Points: The game tracks your score, arcade-style. You receive a bonus for finishing a level quickly, and can earn extra lives at certain scores.
 * Sentry Gun: There are quite a few of these found on the ground and on walls, and they typically deal a lot more damage then mobile foes. A stronger, larger kind guards each Gate Key.
 * Slippy Slidey Ice World: The Fallen Wastelands, seen in worlds 2 and 5. Characterized by open clearings, large stalagmites and enemies with skis.
 * Shockwave Stomp: The Shockwave secondary weapon. It fires a seismic pulse forward, much like the Thumper weapon in the later 1998 Battlezone 1998 remake.
 * Stuff Blowing Up: Hoo boy. The secondary weapons are all explosive or otherwise highly destructive in comparison to the primary weapons, but have limited ammunition. Still, they are vital to your success, so don't be afraid to use them. But be careful, shrapnel from explosions can damage your vehicle. Keep a good distance from your targets.
 * Randomly Drops: Curiously enough, the weapons, like other Power Ups. This means you might get a Disc One Nuke or be stuck with the low-damage laser for one or more worlds. In addition, weapons used by bosses do not become available to drop until after said boss is beaten.
 * Remixed Level: You revisit each of the three worlds.
 * Video Game Lives: You begin with three, Scoring Points can get you more.