For the Euro Truck Simulator 2 the huge update 1.50 has been released for Linux on Steam.

Changelog

Map

Switzerland Rework
Germany Rework - Rhine region
Scania Demo Centre

Vehicles

MAN TGX Update
Lane assistant feature added
Wielton Trailer Pack DLC Update

UI

Substantial UI design update (Home screen redesign, persistent Status Bar, Quick Menu, new fonts, icons and more)
Settings options show information about what they do

Visual

Improvements in the rendering system
Temporal Anti-Aliasing feature added
Cascaded shadow updates
Soft particles
Lit/shadowed smoke
Far shadows
Optimized light computation
Frame rate limiter added

Sound

Brake squeaking sounds added