Halo Wars 2

This achievement will likely come naturally while playing online matches as Forge, but it can be done quickly in solo Skirmish matches against the AI on Easy. If you're taking this route, head into the Skirmish lobby and make these setting changes:

• Map: Sentry
• Gametype: Deathmatch
• Starting Supply: 9999
• Starting Power: 9999
• Fog of War: Off
• Leader Powers: Off

Now choose Forge as your leader and begin the match. Once the match starts, build an Armory and then build Forge's Warthog when it becomes available. With Forge's Warthog out on the battlefield, send it to each of the Power Nodes around the map. There are usually two Sentinels guarding each Node (there are a total of eight on this map), and Forge's vehicles will eliminate them fairly quickly. If you'd like, you can upgrade the Warthog at the Armory for deadlier firepower.

Once all eight Sentinels have been killed, you can end the match and then start it up again to repeat the process. It shouldn't take too long to net fifty kills in this manner, and once you do, the achievement will unlock.