From Valve Developer Community
- Maybe use some Mapbase Features for this project.
- L4D / Portal 2 style hints.
- Dynamic Lighting
- Base weapon models changed / reanimated or just reanimated
- Some upscaled textures on some props, characters and weapons.
- Change muscle car (jalopy) model.
- Player can see their own body on death.
- Give a more coast side of Half-Life 2 Vibe.
- Use some skydomes from other games.
- Some custom skybox textures for open sea adventures.
- More accurate collision on some props ((just for fun))
- Try and add interiors to every building along the way, for more exploration.
- Alyx Vance has god mode ((i hate when she dies))
- Faster airboat and faster vehicle speed.
- BACK IN 98' - Get the crowbar
- THE HUNT BEGINS - Get the airboat
- SCAVENGE - Loot every island on the open sea areas and loot all interiors
- HEAVY WEAPONS - Find the rocket launcher and take down three gun ships
- SUBMERGED - Go underwater and find the gunship wreckage
- AN EXPERIENCE - Beat the game on normal
- TOUGH FUN - Beat the game on balanced
- SURVIVALIST - Beat the game on hardcore
- MIXED EMOTIONS - Beat the game
- CHAIN REACTION - Start a chain reaction of explosives exploding
- ALL I WANNA DO IS EAT YOUR BRAINS - Get 100 headshots
- CHEST PROBLEMS - Get 50 torso shots
- I NEED SOME CRUTCHES - Get 50 leg shots
- THEY HAD BARED THE DOOR - Arrive late to Nova Prospect
- THE ALYX VANCE - Free Alyx Vance from a combine pod
- ABOUT THAT BEER A I OWE YA - Meet Barney on the coast side
- HACKER - Get Alyx to hack 300 rollermines
- SPRAY AND PRAY - Get fifty automatic gun kills.
- GET PWNED - Kill 100 combine in challenge mode
- GETTING STARTED - Survive combine waves for five minutes.
- THIS IS GETTING FUN - Survive combine waves for ten minutes.
- ALL RIGHT! - Survive combine waves for fifteen minutes.
- AREN'T YOU TIRED YET? - Survive combine waves for forty minutes.
- IM GETTING THERE - Get the bronze metal
- CLOSER... - Get the silver metal
- SO CLOSE... - Get the gold metal
- VICTORY - Get the diamond metal.
