Here is the full list of all 50 Quake 4 (DE) achievements worth 1,000 gamerscore.
Completed Act 1 with the rank of Private.
Completed Act 1 and Act 2 with the rank of Private.
Completed the game with the rank of Private.
Played over 100 Ranked Multiplayer Matches.
Played over 500 Ranked Multiplayer Matches.
Played over 1000 Ranked Multiplayer Matches.
Played over 5000 Ranked Multiplayer Matches.
Achieved the number one rank on the All Gametypes leaderboard.
Achieved a ranking in the top ten on the All Gametypes leaderboard.
Won a Ranked match without ever being fragged.
Completed a level without taking any damage.
Completed a level using only the blaster.
Completed a level using only the hyperblaster.
Completed a level using only the shotgun.
Completed a level using only the machine gun.
Completed a level using only the nailgun.
Completed a level using only the grenade launcher.
Completed a level using only the rocket launcher.
Completed a level using only the lightning gun.
Completed a level using only the dark matter gun.
Completed a level only using the railgun.
Over 100 captures in Ranked matches.
Over 500 captures in Ranked matches.
Over 1000 captures in Ranked matches.
Over 100 frags in Ranked matches.
Over 500 frags in Ranked matches.
For heroism in battle, SGT Raffle of Raven Squad has awarded you the Galactic Order of Heroism.
Over 5000 frags in Ranked matches.
Over 10000 frags in Ranked matches.
Completed Act 1 with the rank of Corporal.
Completed Act 1 and Act 2 with the rank of Corporal.
Completed the game with the rank of Corporal.
Completed Act 1 with the rank of Lieutenant.
Completed Act 1 and Act 2 with the rank of Lieutenant.
Completed the game with the rank of Lieutenant.
Completed Act 1 with the rank of General.
Completed Act 1 and Act 2 with the rank of General.
Completed the game with the rank of General.
Over 100 win points in Ranked matches.
Over 500 win points in Ranked matches.
Over 1000 win points in Ranked matches.
Over 5000 win points in Ranked matches.
Over 250 players have been humilated by you.
For courage in battle alongside Viper Squad, CPL Mahler has awarded you the Solar Star of Courage.
Awarded on completion of a level where a shot was landed with every weapon in a full arsenal.