In the multiplayer mode of Crysis 2, the developers introduced a system of unlocks. Players had to earn experience points to gain levels in order to unlock new weapons and abilities. The system remains in Crysis 3, allowing players to unlock default classes in the early levels, followed by skills, custom classes, weapons, and attachments.
Like the Call of Duty and Battlefield games, leveling up is a central mechanic in the game's online mode, but players don't have to have the the highest levels to gain an edge over their opponents—it merely provides players with a wider range of options.
This hasn't changed with Crysis 3, which features up to 51 levels, the last of which allows players to reboot their skills. Check them out in the list below.
Player Unlocks
| Rank | Unlock | Rank | Unlock |
| 1 | All Default Classes and Games Modes Unlocked | 26 | JAW Detonation Delay |
| 2 | Game Modes Skill Assessments | 27 |
SCAR Dog Tag Frame |
| 3 |
Traveller Skill Assessments Dog Tag Frame |
28 | Expanded Arsenal |
| 4 | Skill Kills Skill Assessments | 29 | Mike |
| 5 | Custom Class 1-5 Weapons & Attachment SA | 30 | XP Bonus Rank 30 Dog Tag |
| 6 |
Point Fire Enhance Dog Tag Frame |
31 | EMP Grenade |
| 7 | Feline + Flashbang | 32 | Dog Tag Frame |
| 8 | Hunter | 33 | Dog Tag Frame |
| 9 | FY71 | 34 | Challenge Skill Assessments |
| 10 |
Armor Transfer Rank 10 Dog Tag |
35 | Majestic |
| 11 | Predator Bow + AY69 | 36 | Dog Tag Frame |
| 12 | Rapid Fire Dog Tag Frame | 37 | Dog Tag Frame |
| 13 | Mk.60 | 38 | Support Bonus Skill Assessments |
| 14 | Low Profile | 39 | Dog Tag Frame |
| 15 | Typhoon + R.E.X. Charge | 40 |
Alien Weapons Skill Assessments Rank 40 Dog Tag |
| 16 | Ordnance Alert | 41 | Dog Tag Frame |
| 17 | Takedown | 42 | Nanosuit Skill Assessments |
| 18 |
Maneuverability Dog Tag Frame |
43 | Dog Tag Frame |
| 19 | Jackal + Hammer | 44 | Marksman Skill Assessment |
| 20 |
ACHIEVEMENT Surveillance Rank 20 Dog Tag |
45 | L-TAG |
| 21 | Grendel | 46 | Alternative Kills Skill Assessments |
| 22 | Aim Enhance | 47 | Dog Tag Frame |
| 23 | Gauss + Smoke Grenade | 48 | Domination Skill Assessment |
| 24 |
Retriever Dog Tag Frame |
49 | Dog Tag Frame |
| 25 | K-Volt | 50 | Rank 50 Dog Tag |
| 51 | Skill Reboot |
