ToDo list is probably the most important thing here to look at, since it's more updated.
Released Crates on Steam Workshop
Released Barrels on Steam Workshop
Released Kilroy Logos on Steam Workshop
Removed need for Rifles to have custom scripts
Removed need for SMGs to have custom scripts
Released Locomotive replacement
Released DoD:S crates for HL2 crates
Released Kilroy for Lambda Logos
Released DoD:S fuel drums for explosive barrels
Released Melees for HL2DM Crowbar
Released Melees for HL2DM Stunstick
I like to bring a little history to a firefight.