New to version 2.1.3 Mac OS X: - (07-18-2008)
• $0.25 of each game purchase will be donated to The National Center For Missing and Exploited Children (NCMEC).
• Compatible with Mac OS 10.2, 10.3, 10.4 and 10.5.
• Challenge Round 3 bug fixes.
• Price reduction to $1.99.
• New installer.

New to version 2.1.2 Mac OS X: - (04-24-2007)
• OS X Tiger (10.4) bug fixed.
• New game registration/activation scheme.
• Swarm Snot is now on a timer to disappear after it splats on ground.
• Bonus dropping U.F.O.s will continue fly-bys until either the cannon is upgraded to 4 missiles or (round# + 1).
• Challenge Round 1 difficulty reduced by 1 (5/5 instead of 6/6).
• Mech Swarm now flash red before firing their lasers.
• Standard Swarm bombs reduced in size for slightly easier dodging.
• Shock Bolt Shield level 3 auto-shoot-back missiles increased in potency.
• Cannon Shock Bolt maximum capped at 6 bolts.
• Cannon Shield maximum capped at 6 shields.
• User interface tweaks.

New to version 2.1.1 Mac OS X: - (03-08-2005)
I want to thank all of the Space Penetrators out there for their valuable input...
• 2-Player Cooperative play - Challenge Round 1 bug fix. (Thank you Darrell M. for the bug report)

New to version 2.1 Mac OS X: - (02-22-2005)
• New feature - 3 different Shock Bolt Shields. Launching 1 Shock Bolt will activate the Shock Shield Basic, launching 2 Shock Bolts will activate the Shock Shield Spikes and launching 3 Shock Bolts will activate the Shock Shield Cannons ( a self-firing offensive variant ).
• New feature - New Gates Penetrators mod option. (Bill Gates of course)
• Players now start with 3 Shock Bolts instead of 0.
• Increased the difficulty-level enemy-life multipliers.
• Mech Swarm, Diamond Mines and Brain Eyes increased in life.
• Reasonable difficulty - Swarm now drop 2 bombs each instead of 1.
• Herculean difficulty - Swarm now drop 3 bombs each instead of 2.
• Fixed Mech Swarm life meter bug.

New to version 2.0.1 Mac OS X: - (02-17-2005)
• Adroit Mark-A cannon - primary missile upgraded to a larger variant. This levels out the accuracy factor with the other two cannons, especially during the Challenge Rounds.
• The Mech Swarm - slight increase in life.
• Left and Right Bracket keys added to custom key assignment.

New to version 2.0 Mac OS X: - (02-11-2005)
• 2-Player Cooperative play option added
• 2-Player Tag Team play option added
• New game menu interface
• Customizable game play key assignment added
• Life meters added to the two Brain Eyes, Mech Swarm and Diamond Mines
• Challenge Round 5 easier to accomplish
• Increased difficulty of Herculean difficulty level
• Reduced the number of rounds needed to win for Painless and Reasonable difficulty levels

New to version 1.8 Mac OS X: - (01-01-2005)
• Challenge Rounds 3 and 4 - now easier to accomplish
• Challenge Rounds 2, 3, 4 and 5 - now give two cannon custom build points instead of one
• Diamond Mines - increased life points, decreased cannon damage
• Thorn Swarm - decreased life points, decreased cannon damage
• Cannons - now fully customizable with 10 initial custom build points
• Cannon Side Guns - now upgrade at ordnance lvls 2 and 4, vs 3 and 5
• High Score Screen - now lists “Round Achieved” - ”Total Rounds”
• Game Tips Screen - lists prizes for winning Challenge Rounds
• Many game play tweaks to make game play a bit easier

New to version 1.7 Mac OS X: - (12-25-2004)
• New enemy unit added: "Thorn Swarm Walkers"
• All 3 cannons are now customizable
• Each cannon now possesses one Master Attribute far exceeding the other 2.
• New Challenge Round 5 added: "Shooting Swarm in a Barrel 2"
• New Main Menu screen added displaying a few game tips
• Many game play tweaks to compensate for the new enemy units and customizable cannons.

New to version 1.6 Mac OS X: - (12-16-2004)
• New enemy unit added: "Thorn Swarm"
• New cannon attack method added: "Side Chain Guns"
• Fixed a bug where game would occasionally not shut down properly.
• Fixed a Challenge Round 4 bug where an enemy laser would be placed (not noticeable) on far left wall.
• Many game play tweaks to compensate for the new enemy units.

New to version 1.5 Mac OS X: - (12-10-2004)
• New Challenge Round 4 added “A Game of Dodge Diamond”
• Challenge Round prizes updated - added 1 cannon stat point to apply to either cannon speed, launch rate, warhead power or armor for successful challenge completion.
• Life meters added to final bosses
• Cannon speeds increased
• Herculean difficulty more difficult
• Diamond Mine and Bonus Glow Ball speeds reduced by 1/2
• After a high score game, player is taken to Top-10 Score Screen where score is highlighted
• Many other tweaks, spit and polish

New to version 1.4 Mac OS X: - (12-06-2004)
• New 3rd cannon - Build Your Own Custom Cannon (Conrad Wilson idea)
• Fullscreen or windowed game toggle (F1 key) (Bart Hibbs idea)
• Explosion effects for killed Swarm (Bart Hibbs suggestion)
• Can now hold down space bar for continuous fire (Bart Hibbs idea)
• Painless difficulty raised from 5 to 9 levels (Lann Wolf idea)
• Game play area was 1000 pixels wide, now 1024 pixels
• More powerful Spectrum Laser attack (Allyson Pardue idea)
• Paused game will now pause all sounds as well as the game (Lann Wolf idea)
• Challenge Rounds are now optional (an option at Choose Weapon Screen)
• Can now press Return Key to skip the intro running-man scene (Bryan Grant idea)
• much more... with more on the way

New to version 1.3 Mac OS X: - (11-25-2004)
• Unregistered personnel may now play Painless and Reasonable difficulty levels.
• New attack method added - if your laser bonus is activated, a laser shot through a Diamond Mine will cause a Spectrum Laser Attack to emit from the sides of the Diamond Mine = massive damage.
• Cosmetic and code efficiency changes

New to version 1.2 Mac OS X: - (11-23-2004)
• 3 challenge rounds added: accessed every 2 game rounds
• Ordnance indicator added to bottom of screen
• Bonus glow balls now drop with a random speed
• 1 round added for Reasonable difficulty victory
• 1 round subtracted for Herculean difficulty victory

New to version 1.1 Mac OS X: - (11-14-2004)
• Lasers now do damage to Final Boss
• Time Warp now affects Final Boss
• Mech Swarm now appear on 4th round vs 3rd round
• High Score now indicates whether game was won or not
• A new unit was added to Final Boss Fight: (2x) Swarm spewing pods (they can be destroyed)
• Optimized sounds and graphics to reduce uncompressed game size from 19.2MB to 9.2MB
• Fixed bug where the Wrench Bonus could crash game

New to version 1.0 Mac OS X: - (11-09-2004)
• Much improved Top-10 High Score engine
• Added a new Mechanized Laser-Firing Alien (Swarm) type
• Added a new cannon type to choose from
• 4 difficulty choices
• Added new Bonuses dropped from U.F.O.s and the Brain Eyes
• New Boss Brain fight ending

New to version 0.19 Mac OS X: - (10-24-2004)
• Added a rudimentary (more improvements on the way) Top-10 High Score engine
• The Aliens (Swarm) can now appear from each side of screen
• Added a new difficulty choice
• Added a "Contributers" screen - morphed to Freeware/Contributeware
• Better chance of getting a Gun Upgrade from U.F.O., if not upgraded yet
• (Gamer Suggestion) Added Q key to quit game.

New to version 0.18 Mac OS X: - (10-20-2004)
• Optimized most of the graphics and sound effects to reduce the uncompressed game size from 38.9MB (v 0.17) to 19.8MB (v 0.18)
• The "BRAIN" is now a moving target. WOW - Mucho increase in difficulty factor
• Reduced the pts needed for shield bonus from 2100 to 1400
• Reduced the life pts of each "EYE" a little
• Reduced the game round number needed to reach the Boss Brain Final Fight by 2 rounds
• Fixed a few memory leaks

New to version 0.17 Mac OS X: - (10-18-2004)
• Initial Public Release