100 Zombies vs 12 OpFor Grunts - Half-Life Opposing Force Retro Battles
24 Zombies vs 12 Grunts - Half-Life Retro Battles
100 Zombies vs 12 Automatic Turrets - Half-Life Retro Battles
12 Shock Troopers vs 12 OpFor Grunts - Half-Life Opposing Force Retro Battles
100 Headcrabs vs 12 Grunts - Half-Life Retro Battles
100 Zombies vs 10 Assassins - Half-Life Retro Battles
12 Security Guards vs 12 Grunts - Even Numbers - Half-Life Retro Battles
1 Gargantua vs 12 Grunts - Half-Life Retro Battles
Gonarch vs 12 Grunts - Half-Life Retro Battles
6 Voltigores vs 12 OpFor Grunts - Half-Life Opposing Force Retro Battles
12 Alien Grunts vs 12 Otis - Even Numbers - Half-Life: Opposing Force Retro Battles
12 Alien Grunts vs 12 HECU Grunts - Even Numbers - Half-Life Retro Battles
24 Vortigaunts vs 12 Grunts - Half-Life Retro Battles
12 Shock Troopers vs 12 Assassins - Half-Life: Opposing Force Retro Battles
12 Otis vs 12 Assassins - Half-Life: Opposing Force Retro Battles
6 Otis vs 12 HL1 Grunts - Half-Life: Opposing Force Retro Battles
12 Alien Grunts vs 12 Security Guards - Even Numbers - Half-Life Retro Battles
24 Alien Controllers vs 12 Grunts - Half-Life Retro Battles
12 Alien Grunts vs 12 Assassins - Even Numbers - Half-Life Retro Battles
100 Headcrabs vs 4 Assassins - Half-Life Retro Battles
