If you don't feel like playing through the old levels from the previous build, if you press 9 on the overworld screen it'll reveal all of the missions.

What's new:

• Level editor tool added to main menu screen.
• Increased player mech's movement speed and overdrive speed.
• Basic gamepad support added.
• New intel log UI and artwork.
• Four new missions:
  • 1. The second mission with grub swarms has been redone completely with new assets and now features supporting NPCs.
  • 2. A mission set in a desert town overrun by giant crabs.
  • 3. A mission at a massive military base where you must destroy SAM sites.
  • 4. A sandstorm has swept through a ruined city where a series of reconnaissance drones have crashed and must be recovered. 
• Added a laser warning alert on HUD with sound that alerts player to incoming enemy missile launches.
• New ambient audio system implemented, enemies now make engine sounds as they move around.
• Technical manual added as optional tutorial on game start.
• Added an Active Protection System (APS) which protects player mech from enemy missiles and mortars.
• Incoming missile warning ring is now drawn as a circle around the player that morphs to highlight threats.
• Three new primary weapons: Maser emitter,  chain gun, and gun/launcher.
• Six new secondary weapons: 
  • Deployable turrets 
  • Wire-guided ATGMs
  • Automatic gun pod
  • Mine launcher
  • Flechette pod
  • Mine-clearing line charges
• Five new enemies to fight: 
  • The E.11 Bannerman maneuver crawler
  • The Soviet T-99 MBT equipped with anti-materiel railgun
  • Stetson PSV (Portable Security Vehicle)
  • Type 57 lightweight crawler biped
  • Martian giant crabs (large and small)
• Tertiary (grenade) slot now has EMPs which temporarily stun groups of enemies. Air strikes have also been added as a tertiary weapon option.
• A separate melee weapon slot has been added to the hangar. You can now choose between the standard plasma slash, gun arms, and a special "plasma dash".
• Enemies now use steering behavior and an A* pathfinding system. They also now use a team system to locate targets, which allows for support NPCs in missions now. 
  • [Not all enemies have been reworked to use steering and pathfinding yet, specifically the hovercrafts and mortar carriers. They'll eventually be completely reworked from scratch]
• Overworld map and UI has been updated, now displays ranks over missions and new 3D flag icons, as well as some information on level conditions.
• Enemies now make a radio chirp sound and show a filled tag marker if they spot a target. Visible lasers are now shown before launching missiles.
• Enemies sometimes show little scrolling text quips above them when idle or see something move.
• Added option to show primary and secondary ammo counters around aim reticule.
• Ammo crates are now air-dropped into the level instead of mysteriously spawning off-screen.
• Added hit sounds when player is damaged by enemy bullets and explosions.
• Player mech now has blowout panels that activate if ammo storage is set alight.
• Added basic mission objectives. They can be viewed by opening a side panel.

Miscellaneous:

• Collisions with destructible building objects are now smoother and have a slight push threshold instead of instantly disintegrating.
• Rotary cannon consumes less ammo, spin-up is now instant, and fires twice the amount of bullets.
• Changed enemy marker icon shapes and added friendly units in green to the radar display.
• Increased fire rate of scattergun and smartgun, added more ammo for Vulcan.
• Buff to flamethrower, increased flame amount and spread.
• Stackgun now reloads slower, firing sound effect has also been changed.
• Added large flocks of birds that scatter when approached or spooked.
• Landmines are now incendiary and create a burst of fire.
• Smoothbore cannon now 1-hit kills tanks and has some building penetration.
• High-energy laser weapon now has larger impact effect plus subtle flicker.
• Player mech now gets covered in blood when fighting flesh enemies at close range.
• Added option to disable HUD vignette in settings menu.
• Bullets that reach the end of their flight path now leave a small mark on the ground and smoke.
• Enemies can be pushed around by the player now. Plasma slashes also knock them back further.
• Grub enemy behavior has been tweaked to attack other targets and not all swarm the player upon spawning.
• Tweaked and added additional particles created by foliage when being destroyed.
• Map points on the overworld now draw pseudo 3D arcs instead of flat lines, as well as unlock in branches.
• Mantis mechs have less health and can be killed by single explosions.
• Exclamation points shown when enemies are alerted are now bigger.
• Updated missile hit indicator cross to be larger.
• Enemies no longer become lobotomized the moment they come into contact with smoke. Needs a lot more work but a slight improvement from before.
• Tanks now continue moving around when they have an ammo cookoff. Barrels also now have shadows.
• Missiles now have audio emitters and only hit cars if the reticle is over one.
• Increased size of enemy target highlight box and added pop-in effect.
• Ammo, secondary weapon, and armor indicators all smoothly tick upward now instead of changing instantly after collecting crates.
• Changed firing sounds of CIWS turrets to be closer to real world ones.
• Minimap icons now have shadows along with offscreen enemy indicator arrows.
• Trees now have smooth swaying instead of changing their angle every few frames.
• Dropship intro smoothly pans camera downward now. Additional particle effects and screenshake also implemented.
• Grub enemies now chase after spider bombs instead of slowing down.
• In-game HUD now fades if player mech is underneath a panel.
• In-game HUD shows glitching effects when taking damage.
• Large trees can now be destroyed by driving into them.
• Changed missile warning beep to solid tone.
• Added rear motion warning on reticule that checks for enemies behind the player when the reticule is far away.
• Armor HUD display now fills to red warning bar when at 0.0 layers.
• Enemy mines will make a sound effect when triggered and tick down to detonation.
• Changed homing missiles to auto-lock when firing singles.
• Mouse centers on screen upon mission starting to stop the camera from whipping to the corner.
• Enemies wobble their chassis slightly and make flame particles when very low on health.
• Certain enemies have built-in retreat behavior and will reverse away from explosions and incoming hazards, or randomly when taking fire.
• Additional civilian vehicle variations added.
• Larger explosive blast marks added on the ground.
• S-rank now requires no damage taken.
• Exit and map buttons in pause menu now show confirmation prompts.

Bug fixes:

• Fixed bullets always sending trees and objects to the right.
• Fixed issue where ammo crates return +0 ammo when collecting them while shooting.
• Fixed missiles and rockets not flying over buildings when reticule is near helicopters or drones.
• Fixed pause menu background sometimes drawing with a slight rotation during level start or screen shake.
• Fixed pressing escape in the settings menu causing a softlock when on the boot screen.
• Fixed railgun charge up bar and text not having outline or changing color to match cursor setting.
• Fixed issue with lighting and shader surfaces misaligning at edges of viewport during heavy screenshake.
• Fixed overworld map rotation snapping issues.
• Fixed issue with quip system causing soft-crash.
• Fixed transport helicopters not using sound emitter positioning.
• Optimized fountain water spray and fixed sound emitter positioning.
• Grubs flash HUD red when damaging the player now.
• Fixed crash if player dies while dropship is still in level.
• Fixed lock-on missiles still firing at targets that are destroyed before they launch.
• Fixed issue with collision detection around player not always destroying small buildings and objects.
• Fixed issue where dropship would despawn on screen if player followed it around long enough.
• Fixed primary weapon tail sounds not playing when ammunition runs out.
• Optimized vehicles and landmines for better performance.
• Mission end rank/results now use a scoring system, so better time, damage, and kills are all weighed instead of always prioritizing the amount of enemies destroyed over time.