AR2

This phrase can refer to several things; please pick one from the list below.

• Abbreviation of "Alarmstufe Rot 2" (German title of Red Alert 2)
• Abbreviation of "Alert Rouge 2" (French title of Red Alert 2)
• The AR2 mod (formerly titled "Allies Revenge 2") for Yuri's Revenge, created by Edward Lau (a.k.a. Chrono)