Here is the full list of all 20 RedSun RTS achievements.
Tiberium upgrade +5%
Tiberium upgrade +10%
Tiberium upgrade +15%
NEW_ACHIEVEMENT_DESC_1_3
Helicopter
Bertha
Crusader 2
Plaszmatower
Mobile radar
Power upgrade
Bombs
Repair upgrade level 1
Repair upgrade level 2
Titan G1
Titan RC1
Armor upgrade
improving oil rig level 1
improving oil rig level 2
Weapon upgrade
Striker