Kill 100 animals
Kill two enemies with a grenade/explosion (in multiplayer game)
Kill a unit shooting through teleporter (in multiplayer game)
Kill 2 enemies in one turn (in multiplayer game)
Finish campaign on easy difficulty
Finish campaign on hard difficulty
Have your unit survive burning damage
Kill 50 units with explosives
Kill four enemies in one turn (in multiplayer game)
Teleport and teleport back in the same turn (in multiplayer game)
Finish campaign on medium difficulty
Kill three enemies in one turn (in multiplayer game)