Gears of War
50 Achievements
1,000
Xbox 360
Is It a Spider?
Kill an enemy with a grenade tag in 100 multiplayer (Player or Ranked) matches of 3+ rounds
20
How to unlock the Is It a Spider? achievement in Gears of War - Definitive Guide
Grenade tags happen when you melee an enemy with grenades equipped. You spawn with a smoke grenade, but you need a frag grenade for this. Frags can be picked up on any map. Kill 100 enemies total in ranked matches with this technique to get the achievement.
For more information, see "Seriously ..."