Hello everyone, after around two weeks of work, I'm happy to announce that I'm done with the 1.3 version. Here is everything new:

• Bullets now have a chance to pierce through NPCs and props. Each weapon has a different chance.
• NPC's now can collide with each other, and can be pushed around.
• In infinite mode, you now get 10 points for surviving every 10 seconds.
• Added a new "Shiny Menu" option in the video settings.
• Added new resolution and fullscreen options to the video settings.
•  Fixed some sound errors regarding "hurtme" and "hurtarmor" commands in the developer console.
•  Campaign, Changelog and About buttons now work in the main menu (despite not having menus)
  • Added new developer console functions:
  • summon [name]: Spawns an NPC in front of the player.
  • newitem [name]: Spawns an item in front of the player.newprop [name]: Spawns a prop in front of the player. 
  • tp [x] [y]: Teleports the player to the given coordinates.
• Items now despawn after 4 minutes. (Can be disabled in the json file of the map)
• Medkit and batteries now have a custom pickup sound. (Just used the Black Mesa SFX for now, but will change it later)
• Two new achievements added:
  • "For a Reason": obtained when all the other achievements are obtained.
  • "Play All Radios": unused & unobtainable. Meant for the campaign mode of the game.
    

• Achievements menu now has a progress text. (might improve it later)
• Hitting ESC now works as a shortcut to "Return" buttons in some menus.