| 2021-06-01 | | Xenonauts 2 - May Update |
| 2022-10-01 | | Xenonauts 2 September Update |
| 2023-01-31 | | Xenonauts 2 January 2023 update |
| 2023-03-31 | | Xenonauts 2 March 2023 update |
| 2023-05-02 | | Xenonauts 2 April 2023 update |
| 2023-06-05 | | Xenonauts 2 May 2023 Update |
| 2023-07-18 | | Milestone 1.20 Released! |
| 2023-07-18 | | Milestone 1.21 Released! (Stability Fix) |
| 2023-07-19 | | Milestone 1.22 Patch Notes (Small Balance Fix) |
| 2023-07-21 | | Milestone 1.23 Released! (Stability Fix) |
| 2023-07-21 | | Milestone 1.24 EXPERIMENTAL Released! (Stability + Gameplay) |
| 2023-07-22 | Update | Our (Updated) Plans for Xenonauts 2 |
| 2023-07-22 | | Milestone 1.25 EXPERIMENTAL Released! (Stability) |
| 2023-07-23 | | Milestone 1.25 Released! (Stability + Gameplay) |
| 2023-07-25 | | Milestone V1.26 Released! (Experimental) |
| 2023-07-26 | | Milestone 1.27 Experimental Released! |
| 2023-07-28 | | Milestone 1.28b Released! |
| 2023-08-02 | Update | Xenonauts 2 - July 2023 Update! |
| 2023-08-02 | | Milestone 1.29 Released! (Experimental) |
| 2023-08-10 | | Milestone 1.29 Stable Released! |
| 2023-08-22 | | Milestone 1.31 Experimental released! |
| 2023-08-22 | | Milestone 1.30 Stable Released! |
| 2023-08-24 | | Milestone 1.31b Experimental Released! |
| 2023-08-25 | | Milestone 1.31 Stable Released! |
| 2023-08-28 | | Milestone 1.31d STABLE Released! |
| 2023-08-31 | | Milestone 1.32 Released! (Experimental) |
| 2023-09-01 | | Milestone 1.32b Released! (Experimental) |
| 2023-09-01 | | Milestone 1.32c Released (Experimental) |
| 2023-09-05 | | Milestone 1.32 STABLE Released! |
| 2023-09-06 | | Milestone 1.33 Released (Experimental) |
| 2023-09-06 | Update | Xenonauts 2 August Development Update! |
| 2023-09-08 | | Milestone 1.33b Released! (Experimental) |
| 2023-09-18 | | Milestone 1.33 Stable released! |
| 2023-10-18 | | Milestone 2.07 Experimental Released! |
| 2023-10-20 | | Milestone 2.07b Experimental Released! |
| 2023-10-20 | | Milestone 2.07c Experimental Released! |
| 2023-10-26 | | Milestone 2.08 Experimental Released! |
| 2023-10-30 | | Milestone 2.08c EXPERIMENTAL Released! |
| 2023-11-01 | | Milestone 2.08d Released! (Experimental) |
| 2023-11-09 | | Milestone 2.09 Experimental Released! |
| 2023-11-14 | | Milestone 2.10 Experimental Released! |
| 2023-11-18 | | Milestone 2.11 Released! (Experimental) |
| 2023-11-20 | | Milestone 2.12 Experimental Released! |
| 2023-11-25 | | Milestone 2.13 Released! (Experimental) |
| 2023-11-28 | Update | Milestone 2 Update Released! |
| 2023-11-30 | | Milestone 2.15 Released! (Experimental) |
| 2023-12-02 | | Milestone 2.15 STABLE Released! |
| 2023-12-02 | | Milestone 2.16 Released! (Stable / Experimental) |
| 2023-12-09 | | Milestone 2.17 Released! (Experimental) |
| 2023-12-13 | | Milestone 2.18 Released! (Experimental) |
| 2023-12-13 | | Milestone 2.19 Released! (Experimental) |
| 2023-12-15 | | Milestone 2.19 STABLE Released! |
| 2023-12-15 | | Milestone 2.20 Released! (Experimental) |
| 2024-01-05 | | Milestone 2.21 Released! (Experimental) |
| 2024-01-27 | | Milestone 3.0.0 Released! (Experimental) |
| 2024-01-30 | | Milestone 3.0.1 Released! (Experimental) |
| 2024-01-30 | | Milestone 3.0.2 Released! (Experimental) |
| 2024-02-01 | | Milestone 3.0.3 Released! (Experimental) |
| 2024-02-03 | | Milestone 3.0.4 Released! (Experimental) |
| 2024-02-09 | | Milestone 3.0.5 Released! (Experimental) |
| 2024-02-14 | | Milestone 3.0.6 Released! (Experimental) |
| 2024-02-16 | | Milestone 3.0.7 Released! (Experimental) |
| 2024-02-18 | | Milestone 3.0.8 Released! (Experimental) |
| 2024-02-19 | Update | Milestone 3 Update Released! (v3.0.8) |
| 2024-02-21 | | Milestone 3.0.9 Released! |
| 2024-02-22 | | Milestone 3.1.0 Released! (Experimental) |
| 2024-02-29 | | Milestone 3.2.0 Released! (Experimental) |
| 2024-03-09 | | Milestone 3.3.0 Released! (Experimental) |
| 2024-03-14 | | Milestone 3.3.0 Released! |
| 2024-03-15 | | Milestone 3.4.0 Released! (Experimental) |
| 2024-03-20 | | Milestone 3.5.0 Released! (Experimental) |
| 2024-03-22 | | Milestone 3.6.0 Released! (Experimental) |
| 2024-03-27 | | Milestone 3.7.0 Released! (Experimental) |
| 2024-03-27 | | Milestone 3.6.0 STABLE Released! |
| 2024-03-28 | | Milestone 3.8.0 Released! (Experimental) |
| 2024-04-09 | | Milestone 3.0.8 STABLE Released! |
| 2024-04-10 | | Milestone 3.10.0 Released! (Experimental) |
| 2024-05-24 | | Milestone 4.0.0 PROTOTYPE released! (Experimental) |
| 2026-04-02 | Released | The game is officially released |
| 2026-04-03 | Early Access | |
| 2026-08-24 | | |