Watch the latest trailer for Silica to see what to expect with the Air Units update, which brings 9 new aircraft to the FPS and RTS hybrid game. Silica is a crossover of FPS and RTS where up to 3 factions battle for control over the planet of Baltarus. Lead from above as commander, or experience the action first-hand, either alone, or with friends. Join one of two human armies, or hunt them down as the territorial aliens.