Not sure if this thread is in the right place, so if it is in the wrong place please do move it away.
Sword Upgrades:
I was thinking that the swords should have upgrades like the other weapons. The following would be upgrade paths, meaning they are mutually exclusive so you can't have all of them, only one.
Name: PS-Katana
Effect: Swords slightly longer and do more damage
Cost: 5000
Appearance: Longer and slightly curved
Name: PS-Defender
Effect: Swords would become shields and have a 50% chance of deflecting bullets (but not plazma). Swords would not be able to do damage anymore
Cost: 5000
Appearance: Large forcefield coming from the hands
Name: PS-Turbo
Effect: Swords would make you go even faster
Cost: 6000
Appearance: Small flames out of each hand, like out of a rocket
Name: PS-Gravity
Effect: Picks up and launches enemies. Swords would not do any direct damage, but enemies could still take damage from walls, etc.
Cost: 10000
Appearance: Black orb in each hand
Name: PS-Virus
Effect: Changes enemy into friend for a short time. Swords would not do any damage.
Cost: 10000
Appearance: Like a large syringe from each hand.
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I also thought that the armor should have certain upgrades, rather than there just being light and heavy suits. The following would be upgrade paths, so you can't have all of them, only one. Unlike the swords, I don't know what they would looks like, so suggestions are welcome.
Name: Rubber Suit or Bubble Suit
Effect: Take less damage from walls and such. Greater bounce off of walls as well.
Cost: 4000
Name: Minesweeper
Effect: Leaves behind a mine every several seconds. Mines can be triggered by players or enemies, so be careful
Cost: 7500
Name: Chainmail
Effect: Gives 250 extra HP, without hampering movement. So Light suit with Chainmail would have 750 health, and Heavy suit with Chainmail would have 1000 health. On Impossible, the Chainmail only gives 50 HP.
Cost: 9000
Name: Crown of Thorns
Effect: Enemies take damage simply from you walking past them
Cost: 10000
Name: Plazmabeam
Effect: Absorbs plazma attacks (7 and and after a certain amount of damage is taken, shoots out a laser beam. The laser beam cannot be controlled or directed.
Cost: 10500