Always bring a healer...
	Easy affection...
	Easy gun proficiency...
	Easy XP...
	Extreme mode...
	Various Steam Achievements...

Fatal Bullet may not be your typical role-playing game filled with swords, magic, and monsters, but your party members still have roles to play during combat. And, as with almost any RPG team, you're going to want to bring a healer along for the ride. There are several healing skills in Fatal Bullet. Some directly restore your health, while others can cure status ailments. Several of Kirito's friends have these skills (namely Sinon and Asuna), so if you're finding progress difficult, it may be worth considering these party members so that you can keep your health topped up. It's also worth mentioning that your own character can learn these skills as well, as can ArFA-sys, your custom companion.

Equip your best Sword Barriers, then go to a dangerous area with your team, such as an area where there are snipers, like the Fourth Area dungeon. Set the difficulty level to Extreme so enemies such as the snipers can perform a one-hit kill. With your Sword Barriers, you should not die, but your teammates will constantly get hit and killed. Simply revive them to get +5% affection. Repeat this process as many times as desired with any characters.

Weapon proficiency increases by using your weapons. It is capped at 1,000. The best way to raise your weapon proficiency is fighting stronger enemies. A good method to increase your gun proficiency is fighting the dungeon boss in the Third Area Of Old South. Use the platform to the left side of the boss and shoot your weapon. When the boss comes towards your location, simply jump down and wait for him to return before running back up the platform.

Keep defeating the Level 10 Elite Automaton in the Floating Tower area to get a lot of XP and good drops. Keep defeating the two NPCs west of the Floating Tower. They increase in level (only when you leave the entire area) as you level up, which makes them a good target to attack. Note: They can be difficult to defeat. Thus, it is recommended to equip your character with skills and abilities to help with health. Both NPCs are set for long range battle, which means you need to focus on close combat. Keep defeating the Scorpion boss south of the Floating Tower within the mounts. This is a challenging boss to defeat, but you will get a lot of XP and good drops. Go to the Western dungeon. There are a lot of enemies in the area. Defeat all of the enemies except for one. The remaining enemy will revive the defeated enemies, allowing you to kill them again. Repeat this as many times as desired to get a lot of XP. After reaching Level 40, go to the Industrial Zone within the Solitary Sands. Most enemies spawning in this area are around Level 50.

Complete the game succesfully with any ending. After defeating the final boss, you are given the "Go Back In Time" or "Start A New Journey" options. If you select the "Go Back In Time" option, you will not unlock Extreme mode. Select the "Start A New Journey" option to unlock the Extreme difficulty under the options menu.

Complete the indicated task to unlock the achievement.

Achievement	How to unlock
A Lost Friend	Unknown.
A True Hero	Unknown.
Allowance, Please!	Give your ArFA-sys an allowance of 100,000 credits or more.
Appraiser	Appraise items 15 times.
Attack on the SBC Flügel!	Defeat the SBC Flügel's gatekeeper.
Award Hunter	Acquire all achievements.
Best Friends Forever	Reach affinity level 4 with every friend.
Boss Hunter	Defeat 10 types of bosses in online co-op quests.
Bounty Hunter	Complete every Hunting Quest.
Bullet of Bullets	Unknown.
Collector	Acquire 100 skills and/or gadgets.
Color Coordinated	Change the color of an outfit.
Elite Player	Reach level 100.
Fall of the Uncrowned Queen	Unknown.
GGO God	Beat the game on Extreme difficulty.
Gift of a Gun	Receive a gun from Itsuki.
Hero of Legend	Unknown.
Master and Me Will Always Be Together!	Grow close to your ArFA-sys.
Master of the Arts	Acquire all Weapon Arts.
Maxed Out	Reach the maximum level with a skill.
Naptime	Have a sleepover.
Oooh, Shiny!	Acquire a Legendary weapon.
OP	Have one stat of 150 or higher.
Popular Player	Deepen your friendship with Premiere, Strea, Philia, and Rain.
Powering Up	Acquire your first ArFA-sys part.
Proof of Friendship	Grow close to Kirito, Asuna, Leafa, Sinon, Lisbeth, Silica, Agil, Klein, Yuuki, Yui, and Argo.
Ranker	Make it into the Bounty Ranking Top 10.
Reaper	Complete every Unique Enemy Quest.
Right-Hand Woman	Grow close to Zeliska.
Second Helping	Acquire your second ArFA-sys part.
Seeker of Fortune	Complete every Treasure Quest.
Squad Leader	Unknown.
That's Kirito for You	Unknown.
The Info Broker	Purchase info from Argo.
The Ultimate Warrior	Reach the maximum level for all weapon categories.
Tinkerer	Enhance or transform weapons 10 times.
Top Dog	Reach 1st place in the Bounty Rankings.
Trader	Exchange medals for items 3 times.
Triple Tune-Up	Acquire your third ArFA-sys part.
Try It On?	Give a friend an outfit as a present.
Uniquely Dead	Defeat your first Unique Enemy.
Veteran Gunslinger	Win 5 online PvP matches.
Weapon Master	Reach the maximum level for a weapon category.
Weaver	Create 5 outfits.
Welcome to the World of Co-op	Participate in an online co-op quest.
Welcome to the World of PvP	Participate in an online PvP match.
You Belong to Me!	Grow close to Kureha.