PS3
Build your first trip through the Ishimura around One Gun. Keep the completed save for a second round and weapon upgrades, and plan a separate run for Impossible. Retain a few saves before short challenges: the game does not have a free chapter-select menu.
The 2008 PS3 list, with 49 campaign trophies. The PS5 remake uses a different list.
- Campaign: Offline platinum; no separately purchased weapons needed.
- Difficulty: Impossible unlocks after finishing the campaign.
- Upgrades: The next round on the completed save carries over equipment.
Finish the first run with the Plasma Cutter
For One Gun, make the Plasma Cutter the only gun you fire. Rotate its beam to line up limb shots, slow enemies with Stasis and use Kinesis where a room calls for moving objects. Sell ammunition you will not use and invest early nodes in damage, the RIG and Stasis. Search side rooms before taking the tram: story logs do not replace the ones you find by exploring.
- Do not fire other guns, even once to try an alternate firing mode.
Keep saves for the optional challenges
Save before the ADS cannon in chapter 4. The trophy checks remaining shield strength at the end, so retry if it falls below the threshold. Keep separate saves before the USM Valor shooting range and before Zero-G Basketball on the crew deck. Those challenges are separate from regular combat and are easier to finish when you pass through the area.
- Check that at least 50% shield strength remains when the cannon sequence ends.
Use the cleared save to finish the arsenal
Load the cleared save for a carryover round. You can now fire every gun: buy the missing models after finding their schematics, then spread your kills across the required weapons. Gather nodes and credits and use the shortest routes through each bench grid. Empty connector spaces are not targets to fill unless they lead to an upgrade.
- Keep the cleared save separate and check every weapon, the RIG, Stasis and Kinesis at the bench.
Start a fresh Impossible campaign
Start a new game on Impossible from the menu after unlocking the difficulty. Save to a separate slot early and confirm the setting before continuing. Keep upgrades focused, avoid shooting torsos and back into corridors when enemies arrive from several vents. Use Stasis often near refill points: slowing one target buys time to sever limbs.
- Do not treat your second-round save as an Impossible clear.
Check the remaining requirements before the final tram
Match remaining trophies to the right save. If you need logs or weapon kills, work on the round with the developed inventory; if a room challenge is missing, load an earlier save. In regular fights target weakened limbs and leave enough room to use the weapon you need for a specific kill.
- Check Legend Teller, Full Arsenal and Maxed Out before retiring the full-inventory save.
Trophies to watch
Epic Tier 3 Engineer
Complete the game on the hardest difficulty setting
Unlock Impossible with the first ending, then finish a fresh campaign on that setting.
One Gun
Beat the game using only the Plasma Cutter
Fire only the Plasma Cutter from the start to the end of the campaign.
Maxed Out
Upgrade all weapons and equipment
Finish the actual upgrades on every weapon and suit system in the carryover round.
Frequently asked questions
Do you need a deathless run?
No. Epic Tier 3 Engineer requires finishing Impossible; you can reload saves.
Can I buy other weapons during One Gun?
Yes. Firing a different weapon is the risk; keep other weapons in storage to avoid it.
Are Marker Fragments required?
No. This is the 2008 PS3 list; the Marker Fragment hunt in New Game Plus belongs to the remake.
Sources
- Electronic Arts · comunicato di lancio europeo PS3
- PlayStationTrophies · lista e percorso PS3
- TrueTrophies · requisito One Gun PS3
Trophy lists
Buying the game
These are Guerranera’s affiliate links. As an Amazon Associate I earn from qualifying purchases.