Here is my 100% Achievement Guide for Observation with ALL Collectibles.
This is simply completing the story and it is a brilliant game!
Below you will find Timestamps for EVERY Achievement & EVERY Collectible incase you miss something.
Hope This Helps!!
Timestamps, Achievements & Collectibles:-
Intro - 00:00
Game Start - 1:45
Collectible 1&2/85 -System Link Reset & Spheres Best Practise (#46 & #44) - 12:10
Achievement 1 - How Did We Get Here? - 25:00
Collectible 3/85 - EAS Hatch Schematic (#65) - 32:50
An Anomaly Part 1 (1/4 Hexagon) - 36:20
Collectible 4, 5, 6 & 7/85 - Sphere Upgrade Procedure, Sphere Upgrade HVC A, Sphere Upgrade HVC B & Sphere Script Compiler HVC (#51, #53, #58 & #49) - 40:40
Collectible 8/85 - Sphere Firmware Flash Log (#72) - 41:15
Collectible 9/85 - JR - EF - In My Suit, Heading Out (#15) - 42:45
Achievement 2 - Searching For Josh - 42:45
Collectible 10/85 - Experimental Fusion Reactor (#45) - 47:45
Achievement 3 - Base Of Operations - 51:00
Achievement 4 - Looking Good SAM! - 51:30
Collectible 11/85 - Coolant Network Schematic (#48) - 53:00
Collectible 12 & 13/85 - JR - EF - Date Night & Coolant Network Schematic (#13 & #57) - 53:10
Collectible 14/85 - Coolant Network Schematic (#70) - 53:50
Collectibles 15, 16 & 17/85 - UN Hatch Schematic, JE - ALL - Almost There & Decryption Protocol (#66, #7 & #47) - 54:30
Collectible 18/85 - JR - JE - Reactor On Standby (#14) - 1:03:40
Collectible 19/85 - Experiment Order #244 (#36) - 1:06:00
Collectible 20/85 - JR - Home - All Good Up Here (#12) - 1:06:15
Collectible 21/85 - Crew Tracker Emergency Protocol (#50) - 1:06:50
Collectible 22/85 - RMS Data Log (#63) - 1:07:10
Collectible 23/85 - JR - MM - Sphere Use Cleared (#16) - 1:07:30
Collectible 24 & 25/85 - RU Hatch Schematic & JE - ALL - Thank You (#9 & #68) - 1:09:00
Collectible 26/85 - SL - AY - Survey Data (#28) - 1:11:30
Collectible 27/85 - Graduation Photo (#34) - 1:20:00
Collectible 28/85 - Marker Observstions (#35) - 1:20:35
Collectible 29/85 - JE - HOME - Good Luck (#6) - 1:20:50
An Anomaly Part 2 (2/4 Hexagon) - 1:21:30
Collectible 30 & 31/85 - Corrupt Audio Data 1 & 2 (#54 & #59) - 1:27:10
Collectible 32/85 - Cleaned Audio Message (#73) - 1:27:55
Collectible 33/85 - MM - JE - Uneccessary Rotations (#21) - 1:29:20
Collectible 34/85 - Mae Spacewalk Photograph (#38) - 1:29:50
Collectible 35/85 - AY - HOME - Bad Day (#23) - 1:30:25
Collectible 36/85 - Landmark Research On Observation (#39) - 1:31:00
Collectible 37/85 - Sphere Experiment Notes (#37) - 1:31:45
Collectible 38/85 - EF - JR - Personal (#2) - 1:32:15
Collectible 39/85 - JE - GC - Event Marker Approach (#8) - 1:32:45
Collectible 40/85 - Biomedical Results: Jim Elias (#32) - 1:33:10
Collectible 41/85 - MM - SL & AY - Emma & Josh (#19) - 1:33:45
Collectible 42/85 - Stanislav Sketch (#41) - 1:34:10
Collectible 43/85 - Toru Data Log (#64) - 1:34:40
Collectible 44/85 - SL - EF - New Orbital Path? (#29) - 1:35:15
Collectible 45/85 - Station Functionality Review (#42) - 1:35:45
Collectible 46/85 - MM - JE - Emigrating To China (#20) - 1:36:15
Collectible 47/85 - AY - CCI - Data Drop Uploaded (#24) - 1:37:00
Collectible 48/85 - Climatology Thesis (#40) - 1:37:30
Collectible 49/85 - CN Hatch Schematic (#67) - 1:37:45
Collectible 50/85 - LOSS: CN Arm (#83) - 1:38:00
Collectible 51/85 - MELFI Unit Log (#62) - 1:39:20
Collectible 52/85 - EMU Calibration Unit (#61) - 1:39:40
Collectible 53 & 54/85 - EMU Suit Information & EF - ALL - Weeklies & Gym Times (#52 & #1) - 1:40:25
Alternate Station Start - 1:54:55
Achievement 5 - Abandon Station - 1:54:55
Collectible 55/85 - JE - ALL - Get On With It (#10) - 1:46:45
Collectible 56/85 - AY - JR - I'm Stuck (#26) - 1:48:20
Collectible 57/85 - Help! (#4) - 1:50:50
Collectible 58/85 - EF - JR - Get SAM Online (#5) - 1:52:40
Collectible 59/85 - SL - ALL - Josh Injured (#31) - 1:53:20
Collectible 60/85 - Toru Data Log (#55) - 1:54:50
Collectible 61/85 - JR - ALL - Anyone Seen Jim? (#17) - 1:54:10
Collectible 62/85 - SL - GC - Emergency (#30) - 1:54:30
Collectible 63/85 - MM - MM - Storm On Saturn (#22) - 1:55:05
Collectible 64/85 - Mae Morgan Bio (#78) - 1:55:25
Collectible 65/85 - JE - ALL - Suggestions Welcome (#11) - 2:01:10
Collectible 66/85 - Jim Ella's Bio (#75) - 2:01:45
Achievement 6 - Another Emma, Dead? - 2:03:55
Collectible 67/85 - JR - ALL - Bring Her? (#18) - 2:09:40
Collectible 68/85 - Josh Ramon Bio (#76) - 2:10:00
Back on Original Station Start - 2:15:40
Collectibles 69, 70 & 71/85 - SL - JR - Experimental Boosts!, Experimental Boost HVC & Experimental Boost Compiler HVC (#27, #43 & #56) - 2:18:05
Collectible 72/85 - Experimental Firmware Flash Log (#71) - 2:18:45
Collectible 73/85 - Loss: RU Arm (#82) - 2:19:35
Collectible 74/85 - Stanislav Leonov Bio (#77) - 2:20:05
Collectible 75/85 - AY - SL - What Is Going On? (#25) - 2:24:50
Collectible 76/85 - Ailsa Yang Bio (#79) - 2:25:15
Collectible 77/85 - Command Terminal Schematic (#69) - 2:32:35
An Anomaly Part 3 (3/4 Hexagons) - 2:34:45
Achievement 7 - Kill Jim - (Start) - 2:37:55 - (Finish) 2:40:55
Collectible 78 & 79/85 - Josh & Emma, ??-?? Error ??? (#33 & #3) - 2:44:40
Achievement 8 - Searching The Bunks - 2:44:40
Collectible 80/85 - LOSS: EAS Arm (#81) - 2:45:15
Collectible 81/85 - Emma Fisher Bio (#74) - 2:45:55
Collectible 82/85 - The Crew (#85) - 2:46:30
Collectible 83/85 - Jettison Protocol (#60) - 2:54:50
Collectible 84/85 - LOSS: UN Arm (#80) - 2:55:50
Collectible 85/85 - The Loss (#84) - 2:56:25
Achievement 9 - Memory Recovered - 2:56:40
An Anomaly Part 4 (4/4 Hexagons) - 3:08:20
Achievement 10 - An Anomaly - 3:11:00
Achievement 11 - Bring Them - 3:12:40