The TL;DR is that I changed a ton of numbers, fixed a bunch of bugs, and added a new item: The Lasbreaker. You should be able to carry over your old saves, but it would be best to start a new character to stay balanced.

Additions:

• Added the Lasbreaker, a new icebreaker type that damages all enemies touching the hack link
• Added a bunch of new achievements, including Humble Beginnings
• You can teleport to another player in multiplayer by holding tab and clicking their name
• XP is now shared evenly among all players within 50 meters in multiplayer
• Added Sprint Toggle option so you don't have to hold the button down
• All text in the game has a new font, which should help Linux players who don't have Arial. It also looks really cool
• :D added to multiplayer (you'll know it when you see it)
  

• The SHARK now scales with difficulty... strongly
• Damage Returned now scales much more with ilevel
• Changed item rarity colors
• The color red should now only be used in text for bad things. Magenta is used for Weapon stats now
• Set Items have been renamed to Epic items, to properly correspond to their function, since sets aren't implemented
• Weapon Range talent nerfed to 5
• RAM Regen talent changed to 5%
• RAM talent changed to 5%
• Health talent changed to 5%
• Movement speed talent removed (but items now have more)
• Weapon recoil is lower
• Machineguns have been tweaked to be more competitive with snipers and shotguns
• Reason (the Unique machinegun) has been buffed
• Railguns fire faster and cost less RAM, but do less damage
• Most modular weapons fire faster
• Icebreakers hack faster and scale better with ilevel, but cost more RAM
• Item level to Required Level scaling has changed
• Item affixes overall are more variable
• The homing affix now has a maximum amount that can drop on an item
• You now only lose 10% of your credits on death, but the maximum amount you can lose is now 250k (from 50k)
• Enemy HP scaling has changed (more at high level)
• Enemy Damage scaling has changed (less at high level)
• You now get most of your XP from hacking instead of killing enemies
• XP required to level has been lowered, since enemies give less XP now
• Lasgun damage has been lowered a bit, RAM cost has increased a bit. Still pretty OP
• Mines no longer shake your screen as much
• Only 30 enemies can spawn from a server at one time (60 from all servers), but servers will spawn the same total number of enemies before being hacked
• Jetpack is now quieter
• The store near the spawn zone has lower level loot now
• Knockback to players shouldn't ever be *too* ridiculous
• Player HP and RAM Regen per level has been buffed
• Only unique items have a minimum level requirement of 5 now
• Items now cost more from stores compared to how much they sell for, encouraging players to hack for items instead of shop
• Players can no longer spawn more than 6 mines per mine item - spawning more causes the oldest one to explode
• Jetpacks now use a percentage of your RAM that increases as they heat up. This is so that players can no longer fly forever, so they actually have to give the enemies a fighting chance.
• The hack timer is now a progress bar counting up (It's at 80%! I need more time!)
• When you create a character, the default is a blank bar, which should lead to some more interesting names in multiplayer. Random names are still available
• Players can no longer choose to not spawn buildings (which people thought was a bug)
• Enemies fall to the ground faster
• All player projectiles fly faster, so you don't need to put as much of a lead on enemies
• Players can select the closest multiplayer webserver to them manually. All games are visible from all servers. I'm talking about the real, physical, out-of-the-game cloud server that hosts multiplayer games, not in-game servers.
• Servers drop 3 loot less often (1-3 is still what you get)
• Damage taken redness is now a LOT more noticeable, especially after taking multiple hits
• Healing items (Instant and Over Time) heal for a lot more
• The SHARK's death explosion is a lot more spectacular now
• Sprinting now looks cool as it changes your view a bit
• Mines do less damage and use more RAM, but are still super strong
• You can no longer unequip an icebreaker or mine while they're in use, or a jetpack while it's heated up
• Maximum movement speed is now +150% (down from +200%)
• Additional hack range on items is a little lower
• Missiles don't knock enemies back as far
• Other servers spawn further away from Finality
• Finality spawns further away from the spawn zone
  

• Dying now causes the game to save, so going back to the main menu won't make you lose progress
• Updated the achievement system to work even if you exit the game prematurely
• Mines and Health Powerups now can fall through enemy shields
• Achievement: Pay, Pal now works even if you drag and drop the item
• Enemies can no longer fly at you when you're jetpacking about. They can still jump
• Piercing weapons no longer go through the floor
• Firing two lasguns at once no longer causes crit problems
• Crit and Crit Multiplier are no longer global affixes
• Shops now drop the appropriate item level loot when hacked
• Swarm Server info terminals now display text appropriately
• Enemies no longer seem to stick to you when they're close
• Jumping off mines to effectively walk on air has been disabled
• Pressing enter after you die no longer causes issues
• Skipping the intro video should be faster and not cause issues
• Enemy Shields and Mines should no longer cause lag
• More enemies can be on screen at once now
• Player mines shouldn't blow up on other players in multiplayer
• The modding menu buttons for payloads and unique payloads have been fixed
• Zombie Derezzed enemies should no longer appear
• Joining games with passwords now works properly
• Swarm buildings now change colors properly in multiplayer
• Jump buildings no longer drop the item on top of them when they're hacked
• XP can no longer overflow into negative numbers
• Aimbots and the SHARK are now much better at chasing you down
• You can no longer hear icebreakers from across the map in multiplayer
• Camera shake can be turned down properly now
• The Flatline talent now properly checks for you to be below 5% HP
• Enemies no longer keep being knocked back after teleporting to respawn
• Frostbiter, one of the unique lasguns, spawns less particles and therefore causes less lag
• Music doesn't change way too often anymore
• Really high RAM regen no longer causes items to not reserve RAM
• You can now see damage numbers in multiplayer (crits don't show as red, though)
• You can no longer see the original pre-bloom/1990/CRT textures on items in close range peripheral vision
• Jump puzzle buildings now always have the correct level displayed in multiplayer