Warhammer 40,000: Space Marine
35 Achievements
Master of Sword and Gun
Complete a Chapter of the single-player campaign using only the Bolt Pistol and Chainsword.
1.0%
How to unlock the Master of Sword and Gun achievement in Warhammer 40,000: Space Marine - Definitive Guide
NOTE: You CAN select the final checkpoint of the chapter to obtain these -- you don't have to start from the beginning of the chapter.
Just go to chapter select, choose the last checkpoint in Chapter 3, set the difficulty to easy, and cruise through the chapter.
You will have both required weapons already in your inventory from the start.
NOTE: Rhyolitic pointed out that after you exit from the shell chamber, you need to continuecacross the bridge. This will get you to a checkpoint, and should unlock the achievement. Thanks to Rhyolitic!!
Enjoy.
Also, it seems that the charge attack and the stomp attack do not affect the achievement.
You start off with a bolt pistol and combat knife, so just use the pistol until you get the chainsword and it's easy as that.
You can collect the other weapons as well, as long as you don't use them. And stunning and then healing yourself via B, doesn't break the achievement, even if you only have the combat knife (just don't swing it).
You'll receive the Chainsword during chapter 2. You must use either the Bolt Pistol and/or the Chainsword during this chapter. The smart idea would be to use the Bolt Pistol until getting the Chainsword and (if on easy) just using the Chainsword for the rest of the chapter. DO NOT USE GRENADES.
If you're worried about accidentally using the Combat Knife, play on chapter 3 because you'll only have the Bolt Pistol and the Chainsword (just don't use the regular Bolter). Thanks c1ned1ne!
The Chainsword is aquired on Chapter 2, after it starts. You must complete an entire chapter firing only the Bolt Pistol and swinging the Chainsword. It's also worth noting that the Plasma Pistol you gain in Chapter 6 is a permenant swap; therefore you must complete this achievement before Chapter 6 to get this achievement.
USING GRENADES WILL VOID THIS ACHIEVEMENT.
Any easy way to get this achievement is to simply load the final checkpoint on Chapter 2 and finish the level with your bolt pistol and chainsword.