Cookies on Acheev

We use cookies and similar technologies for the things below. You can accept all, reject everything except what's essential, or pick what you're OK with.

Improvement
Anonymous usage measurement so we can fix bugs and prioritise work.

Read our cookies policy and the privacy policy. California residents: Do Not Sell or Share My Personal Information.

Loading…
logo
Sign in
Synergy cover

Synergy

Achievement guide · roadmap · tracker

Synergy is a Half-Life 2 Modification that enables you to play through the Half-Life 2 series and many other 3rd-party campaigns cooperatively with friends.

Shooter Platform Action Science fiction
2005 ★ 79 1 achievements Guide 0%
Steam

Track your progress

Sign in with Steam or Xbox to mark off unlocks, filter what's left and showcase your 100%s.

  • Live unlock status per achievement
  • Hide-unlocked filter
  • 100% showcase on your profile
Sign in
Help improve this guide
Sign in to request a guide
1 achievements
Rebel Rusher

Rebel Rusher

Participate in a Rebel Rush event.

Related games

Terraria
Terraria
166 achievements
Rise of the Tomb Raider
Rise of the Tomb Raider
142 achievements
Grand Theft Auto V
Grand Theft Auto V
77 achievements
Deep Rock Galactic
Deep Rock Galactic
69 achievements
Borderlands 3
Borderlands 3
82 achievements
Halo 5: Guardians
Halo 5: Guardians
73 achievements
Hollow Knight
Hollow Knight
63 achievements
Slime Rancher
Slime Rancher
60 achievements
Palworld
Palworld
57 achievements
Atomfall
Atomfall
54 achievements
Metro 2033
Metro 2033
48 achievements
Metro 2033 Redux
Metro 2033 Redux
49 achievements

Explore more lists

Best Shooter Games for Achievements Best Platformer Games for Achievements Best Steam Games for Achievements Rarest Achievements