Shadow of the Tomb Raider
99 Achievements
1,690
47-64h
Total Party Kill
Kill 5 enemies with friendly fire
10
18.6%
How to unlock the Total Party Kill achievement in Shadow of the Tomb Raider - Definitive Guide
Straight after there is a great opportunity to use it in the jungle. Just wait till an armed enemy is close to another enemy. If you use it on an enemy when no ones around they will just shoot randomly & won't kill anyone.
1. Get the DLC tombs. There's 7 different tombs (they are all full fledged missions with build up and tombs, lots of fun). Some of those missions have enemies.
2. New Game+
If, like me, you have already finished both the campaign and DLC before unlocking the achievement, then #2 is your only option. New Game+ will carry over all skills & upgrades that you've already unlocked, including those that you unlock with story progression.
Your first chance to unlock the achievement will come in the Path of the Living mission right after you reach Kuwaq Yaku. It's about 30-60 minutes into the game, once you start fresh with NG+. It HAS to be NG+.
This achievement is missable since there are no enemies present in the game world post-story.
During the main mission "Downpour," you will automatically unlock the Jaguar's Fear skill. This skill allows you to fire a fear arrow at an enemy, which will in turn cause them to open fire—often time killing their squad mates in the process—in a rage of panic. In order to craft a fear arrow, you will need to open the weapon wheel, scroll over to the the left-most arrow type, and then hold . This will require a silent arrow, cloth, and dart poison (which can be collected off critters with the Owl's Meal skill).
Shortly after unlocking this skill, you will climb a tree, perch on a branch, and the game will more or less enforce you to use a fear arrow on one of the three enemies below your position. Shoot the closest enemy and once he starts to panic, he should kill one of the other two Trinity soldiers with a spray of bullets. After you earn the XP for this friendly-fire kill, reload your checkpoint and do this four more times to unlock the achievement.